Answers
Answer:
[tex]$\tex$ Option 2: Aluminum (Al)[/tex]
Explanation:
When we are given Bohr models, we will be given a circle with rings surrounding it. The circle in the center of the model represents the nucleus, which contains the neutrons and the protons. The rings will have spherical structures that are attached to them in an orderly fashion - these model the electrons of an atom.
Protons are positively-charged subatomic particles that also identify the atom's chemical identity and atomic number. Using the number of protons, we are able to identify the element. The neutrons are the neutrally-charged subatomic particles that give an atom its weight. When you look at a traditional periodic table, you'll see that the square that houses an element has its symbol, atomic number, and atomic mass. The atomic mass is equivalent to the sum of the protons and neutrons.Electrons are negatively-charged subatomic particles that give an atom its overall charge. In order for an atom to be stable and neutral, the electrons must equal the protons. Otherwise, we have an unstable atom called an ion with either a positive or a negative charge. This is dependent on whether an atom has gained or lost electrons.When we reference the model, we will see that there are 13 "p" and 14 "n" within the green circle. The "n" refers to neutrons and the "p" refers to protons. We can also count the red spheres and make quick observations about these: there are 2 red spheres on the innermost ring - for simplicity reasons, we will title this ring as r = 1. There are 8 red spheres on the middle ring - this ring will be titled r = 2. Finally, we can see that there are 2 more electrons in the outermost ring - this ring will be titled r = 3.
Now, because we have 13 protons, we know that the protons are equivalent to the atomic number.
If we check the periodic table, we will see that Silicon (Si) has an atomic number of 14. This doesn't match the number of protons, so we can rule out that a silicon atom is not the element shown.When we use the same process and check aluminum, we discover that Aluminum (Al) has an atomic number of 13. Since the number of protons and the atomic number are equal, we can conclude that this is the element.If we check Helium (He), we see that it has an atomic number of 2, so this is definitely not our element in question.Now that we have concluded that Aluminum is our element, we can check this to be sure. If we use the formula m = n + p (where m is the atomic mass, n is the neutrons, and p is the protons), we can check to be sure we have selected the right element.
The given mass of aluminum on the periodic table is 26.982 atomic mass units. We round to the nearest integer when it comes to this, so we round 26.982 up to 27 even.
Now that we have determined the atomic mass and we are given the number of both protons and neutrons, we can act as if we weren't given the amount of neutrons and only the mass and amount of protons. We can then use the equation to solve for the amount of neutrons and check that the selection we made is correct.
Steps
Substitute 27 for m and 13 for p.Subtract 13 from both sides to isolate the n and place the constants on the same side of the equation.Combine like terms by taking the appropriate operations (in this case, this is subtracting 13 from 27).Finally, because we are solving for n, you can reverse the equation (place the constant on the right and place the variable on the left; i.e., 72 = x → x = 72).[tex]27 = n + 13\\\\27 - 13 = n\\\\14 = n\\\\n = 14[/tex]
The work we just performed will allow us to confirm that because we solved for 14 neutrons, Aluminum (Al) is indeed the element represented by the model.
Hope this helps! :)
Related Questions
help me plz Identify the state of matter.
Answers
Answer:
solid
Explanation:
Definite shape and definite volume
Non-compressible
Liquid- particles slide past each other
Definite volume, no definite shape
Non-compressible
Gas- no definite shape
No definite volume
Compressible
Hope this helps!
According to cell theory, all organisms are made of one or more cells. Which is also a statement of the cell theory?
a.
All cells perform specialized functions.
b.
All cells can generate new organisms.
c.
All cells must come from preexisting cells.
d.
All cells need other cells in order to survive.
Answers
Karissa is conducting an experiment on the amount of salt that dissolves in water at different temperatures. She repeats her tests several times using the same procedure.
What can Karissa do to further increase confidence in the results of her experiment?
1) have another scientist run the same exact procedure in her lab.
2) include several other liquids for comparison.
3) calculate the average amount of salt that dissolves to summarize findings.
4) make sure the experiment follows a specific procedure that allows other scientists to produce the same findings.
Answers
Answer:
I think its 3
Explanation:
What is the life span of our sun?
What is the life span of stars larger than the sun?
Answers
Answer:
What is the life span of our sun?
Stars like our Sun burn for about nine or 10 billion years. So our Sun is about halfway through its life. But don't worry. It still has about 5,000,000,000—five billion—years to go.
What is the life span of stars larger than the sun?
Stars live different lengths of time, depending on how big they are. A star like our sun lives for about 10 billion years, while a star which weighs 20 times as much lives only 10 million years, about a thousandth as long.
Explanation:
(A student is investigating the distribution of charges in insulators. The student will place an aluminum metal can on top of a foam cup and touch the side of the foam cup with a negatively charged rod. The setup for the investigation is shown in the diagram.) What will most likely happen to the electrons when the rod touches the foam cup?
A) The electrons will pass to the foam cup but will remain in a localized, positively charged area on the cup where the rod was placed.
B) The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.
C) The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become negatively charged.
D) The electrons will pass to the foam cup but will remain in a localized, negatively charged area on the cup where the rod was placed.
Answers
Answer:B) The electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.
Explanation: USA TestPrep..am I right?
According to the forces of attraction,the electrons will pass from the foam cup to the aluminum can, and both the foam cup and the aluminum can will become positively charged.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
Learn more about forces of attraction,here:
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(Gillian is investigating the distribution of charge in objects using friction. Gillian gently rubs a rubber balloon on the fur of her pet cat. When she pulls the balloon away from the cat's fur, the fur is attracted to the balloon.) Which BEST explains why the fur becomes attracted to the balloon?
A) Rubbing the balloon along the cat transfers extra protons from the balloon to the cat.
B) Rubbing the balloon along the cat transfers extra electrons from the cat to the balloon.
C) Rubbing the balloon along the cat creates extra protons that will stick to both the balloon and cat.
D) Rubbing the balloon along the cat creates extra electrons that will stick to both the balloon and cat.
Answers
Rubbing the balloon along the cat transfers extra electrons from the cat to the balloon.
What are static charges?
The static charges are the charges that are developed on objects that are stationary. There are several ways by which static charges could be developed. One of the ways that static charges could be developed is by the use of friction. Friction is known to occur when surfaces are being rubbed together in such a way that there must have to be a transfer of charges.
Thus, in this case, we are told that Gillian gently rubs a rubber balloon on the fur of her pet cat. When she pulls the balloon away from the cat's fur, the fur is attracted to the balloon.
The reason why the fur becomes attracted to the balloon is that rubbing the balloon along the cat transfers extra electrons from the cat to the balloon.
Learn more about static charges:brainly.com/question/15800304
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According to the forces of attraction, rubbing the balloon along the cat transfers extra electrons from the cat to the balloon.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
Learn more about forces of attraction,here:
https://brainly.com/question/23841038
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Why does a large mass star will have a different life cycle than a small mass star?
Answers
Answer:
is on the explantion.
Explanation:
The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born. Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin.
A piece of copper at 10 °C is dropped into a glass of water at 35 °C. Which statement is correct? (4 points)
A) Heat will flow from the copper to the water in the glass until both reach the same temperature.
B) Heat will flow from the water in the glass to the copper until both reach the same temperature.
C) The final temperature of the water in the glass and the copper will be 10 °C.
D) The final temperature of the water in the glass and the copper will be 35 °C.
Answers
Answer:
B
Explanation:
Heat will flow from water to copper until both reach same temperature.
Answer: B.) Heat will flow from the water in the glass to the copper until both reach the same temperature
Explanation: i took the flvs test and got it right
Can someone answer the questions from the documents?
Answers
Answer:
no,because the documents tells us about that subject and explain about information
An electron in a hydrogen atom moves from level 3 to level1. In a second hydrogen atom, an electron drops from level 2 to 1 . Which statement describes the most likely result
Answers
Answer:
In a second hydrogen atom, an electron drops from level 2 to 1 .
Please Help I need it!!
(The picture shows a child sliding down a plastic slide.)
Which statement best describes why the child's hair stands up after he slides down the slide?
A) Friction caused a transfer of electrons between the slide and the child, making each of his like-charged hairs repel each other.
B) Energy was transferred from the slide to the child through induction, causing the child's hair to become charged and stand up.
C) Energy was transferred from the child to the slide through conduction, causing the child's hair to become charged and stand up.
D) Friction caused a transfer of electrons between the slide and the child, making his like-charged hairs attract the air through induction.
Answers
Answer:
Your answer is A: Friction caused a transfer of electrons between the slide and the child, making each of his like-charged hairs repel each other.
Explanation:
The most likely explanation for why the child's hair stands up after sliding down the slide is due to the transfer of electrons caused by friction between the slide and the child's hair. Hence, option A is correct.
Why does the child's hair stand up after sliding down the slide?When the child slides down the slide, there is friction between the slide and the child's hair. This friction causes a transfer of electrons between the two surfaces, with electrons moving from one surface to the other.
This transfer of electrons can result in the child's hair becoming negatively charged, which causes the individual hairs to repel each other, leading to the hair standing up.
Therefore, the correct answer is A Friction caused a transfer of electrons between the slide and the child, making each of his like-charged hairs repel each other.
Learn more about friction, here:
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Please help me! I will give brainlist! (I think that’s how it’s spelt-)
Answers
Answer:
I believe its 1,2,5, tick all of the ones I listed.
A graph of energy consumption in the United States versus time slopes upward.
What does this indicate about the energy consumption?
It has decreased.
It has increased.
It has fluctuated.
It has stayed the same.
Answers
the answer is It has increased.
when time increases the need for energy consumption also increases. This might be due to increase in population with time that has lead to increase in consumption of energy. Thus, we can conclude that out of the given options
Could you help me???
Answers
Answer:
First one is by the food we eat, we get fuel to be able to move and do work.
Second one is, the effect of speed on kinetic energy is the faster or slower something is going at, the more or less movement needed.
#1
We get the energy by the foods we take and respiration+ digestion plays key role in transformation
#2
Faster the speed faster the Kinetic energySlower the speed slower the Kinetic energyThis is because KE=1/2mv²
Describe a young star.
Answers
purrrrr king of rap
Someone help pls thank you i will give brainliest
Answers
Answer: See attached image
Explanation:
It's the same as that other guy answered:
(Plus, I'm not plagiarizing, I'm just answering that it's the same answer as the other guy commented.)
(GIVING BRAINLYLIST) Describe an adaptation to a plant's physical characteristic and explain how this adaptation helps the plant survive.
Answers
Answer:
Because tree's have a type of wax coating that helps the tree's survive and adapt to a type of climate zone.
Explanation:
Help needed ASAP!
Thanks for helping!!:)
Answers
Answer:
I hope this helps you :)
Explanation:
Question 1 - BQuestion 2 - AQuestion 3 - DQuestion 4 - CQuestion 1: Hypothesis and Data Collection
pls, help asp. In this activity, you will examine soil composition. Place one cup of your soil sample in a glass. Slowly add water to the glass until the water comes to the top. Stir the soil and water thoroughly.
Part A
Write down your prediction about what will happen when you let the soil sit for one hour.
Answers
Answer:
If we let the jar consisting of 1/3 soil sit for one hour, then the soil height will increase/decrease (select what option you predict).
Explanation:
- The hypothesis typically has a layout of if *indepent variable* is *change*, then the *dependent variable* will *change*.
- Independent variables are variables that change
- Dependent variables are variables that are affected by the change
- Control variables are variables that remain the same, in order for the experiment to be fair
Answer:
The soil particles are heavier so after a while this oil settles down to the bottom of the class remaining almost to clean filter at the top,
Explanation:
Why can't a volume of water be compressed or expanded like a volume of air in a closed syringe system?
Answers
Answer:
It is all about pressure. When you plug upon the nozzle, there is no way for the pressure of the fluid to rise above a certain value, so pushing in is opposed by the fluid pushing back on your finger, it gets hard! However, if you open the valve and allow fluid to squeeze out, then the pressure can be relieved a bit and that allows you to keep the piston moving down. That is applying an unbalanced force that allows the fluid to accelerate from zero velocity inside the barrel to some higher velocity through the nozzle.
Explanation:
how does a flashlight create motion
(not from google please, or at least change a lil bit)
(Science)
Answers
Answer:
Electricity in the flashlight is moved through wires to a bunch of different places. Then it can change forms. When in a flashlight the electrical energy will become light energy and thermal energy inside bulb.
Explanation:
How did I do?
!! HELP PLEASE 55 POINTS !!
Is this statement true or false?
If one or more substances change into new substances, a chemical change occurred.
true
false
Answers
Answer:
true
Explanation:
when a chemical is mixed with another it makes a new one making a reaction inside of the chemical
How long will an object remain at rest, according to Newton's first law of motion?
10 points
A: It can't rest
B: Until noon
C: Until an unbalanced force occurs
D: As long as there are unbalanced forces acting on it
Answers
Until an unbalanced force occurs
Which type of data would be considered qualitative data? diameter measured distance travelled density calculated discoloration amount
Answers
Answer:
Explanation:
Qualitative data is descriptive information that cannot be measured in numbers. So among the choices, only discoloration amount is descriptive and cannot be measured.
The type of data which will be considered as qualitative data is discoloration amount.
What is qualitative data?Qualitative data is that data which depends on the quality not in the quantity of any object.
Diameter, travelled distance and density are the quantitative data means they all depends on the quantity and measurement. Whereas the discoloration amount is the qualitative data as it is not measurable and not depends on the quantity.
Hence correct answer is discoloration amount.
To know more about Qualitative data, visit the below link:
https://brainly.com/question/4729045
Help needed ASAP!
Thanks for the help!!:)
Answers
Answer:
Q1=D
Q2=B
Q3=A
Q4=C
Explanation:
2. B
3. B
4. B
hope this helps
Which of the following statements is NOT true of the Lewis Dot Diagrams?
Answers
The hydrogen gets combined with the carbon dioxide, making _________. *
a. chlorophyll
b. starch
c. glucose
d. xylem
Answers
Answer:
glucose
Explanation:
I need lots of help owo
Answers
They need other brands of cleaners to try it out with, and they need the same type of stain and same amount of stain on each same brand and same type of clothing.
Why is sand NOT considered a mineral?
Answers
Answbecause it is a small rocks
Explanation:
Answer:
Sand is not a mineral because it is made up of different kinds of minerals like quarts. Sand is in fact a sediment, not a mineral.
Explanation:
Hope that helps!
explain what the net force on an object will be if balanced forces act on it. what will happen to the net force if unbalanced forces act on an object?
Answers
Answer:
A force doesn't act on another force. Forces act on objects.
"Unbalanced force" simply means that the sum of all forces acting on an object - that is, the net force - is not equal to zero.
Explanation: