Answer:
2
Explanation:
Silicon is one the elements found in nature and well positioned the periodic table.
It has an atomic number of 14 with an electronic configuration:
1s² 2s² 2p⁶ 3s² 3p⁴
From this formula the orbital notation that represents the second principal energy level is 2.
The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal quantum number.
It takes the number 1,2,3,4,5 e.t.c
What do we call a cloud that forms right on the surface of the Earth? *
Answer:
that's ur answer cumulus clouds I hope it helps
A student in your class has decided to dissolve Epsom salts in water and observe the crystals that are left behind after the water evaporates. Is this an example of a chemical change? Use evidence and scientific reasoning to support your claim.
Answer:
Physical change
Explanation:
Dissolution of salt in water is a typical example of physical change and not a chemical change.
In a chemical change new products are formed which are different from the reactants.
In a physical change, the state of matter changes from one form to another.
Since this is a change in state, a physical change has occurred. Also, the reaction is easily reversible simply by evaporation. Most chemical changes are not easily reversible.Dissolving epsom salts in water and observing the crystals that are left behind after the water evaporates is not a chemical change.
CHEMICAL CHANGE:
Changes that occur in nature can either be physical or chemical. Physical change are those changes that does not involve the chemical property of substances involved. Chemical change, on the other hand, alters the chemical composition of the substances involved. Examples are rusting. Chemical change forms a new product and are usually irreversible. According to this question, dissolving epsom salts in water is not an example of chemical change because it does not involve the formation of new substances.Learn more at: https://brainly.com/question/23693316?referrer=searchResults
How is the behavior of food coloring in the pool and heated water different? What caused the difference in their behavior?
Answer )In hot water, the food coloring diffuses (spreads out) through the water quickly. In cold water, the food coloring diffuses (spreads out) through the water slowly. The hot water causes the food coloring to diffuse faster. At higher temperatures, particles move faster.
i hope it is helpful
Describe each layer of Earth’s current atmosphere below:
Answer:
exosphere thermosphere mesosphere stratosphere troposphere
What is the lowest possible energy level that an electron can occupy?
Answer: the amount of energy needed to move an electron from one zone to another is a fixed, finite amount. At the lowest energy level, the one closest to the atomic center, there is a single 1s orbital that can hold 2 electrons
Explanation:
Which of these are matter?
atoms
molecules
energy
The atoms and molecules are matter. Therefore, option A and B are correct.
What is matter ?Matter is defined as anything that occupies space and has mass—in other words, the "stuff" of the universe. All matter is composed of substances known as elements, which have distinct chemical and physical properties and cannot be broken down into other substances via ordinary chemical reactions.
Matter is defined as anything that occupies space and has mass. Water and air are examples of matter, whereas feelings and sound are not.
Physical and chemical properties can be used to classify matter. Matter is defined as something that occupies space and has mass. Solid, liquid, and gaseous are the three states of matter. The conversion of a material from one state of matter to another without changing its chemical composition is referred to as a physical transition.
Thus, option A and B are correct.
To learn more about the matter, follow the link;
https://brainly.com/question/3764450
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Titanium consists of two isotopes of masses 46.90 amu and 48.95 amu. If the first isotope has a percent abundance of 70.84%, what is the percent abundance of the second isotope?
Answer: 29.16%
Explanation:
The total of 2 percentages need to equal 100% so we subtract the percent they gave us from 100.
Please help me if you good at science I’m over here struggling I’ll mark brainliest :)
Answer:
C.
Explanation:
Ideally speaking, bonds tend to form between two particles such that they are separated by a distance where _______ net force is exerted on them, and their overall energy is _________.
The question is incomplete, the complete question is;
Ideally speaking, bonds tend to form between two particles such that they are separated by a distance where _______ net force is exerted on them, and their overall energy is _________.
A.zero, maximized
B. a negative, minimized
C. a positive, minimized
D. a positive, maximized
E. zero, minimized
F. a negative, maximized
Answer:
E. zero, minimized
Explanation:
Chemical bonding occurs when there is a dynamic equilibrium between the attractive and repulsive forces. This means that the magnitudes of the attractive and repulsive forces are equal and the net force is zero.
Also, at the point where bonding occurs, the energy of the system is minimum. The point on the potential energy curve that represents the bonding energy is the lowest point on the curve.
Ideally speaking, bonds tend to form between two particles such that they
are separated by a distance where zero net force is exerted on them, and
their overall energy is minimized.
For chemical bonding to occur there must be dynamic equilibrium. This is
formed from magnitude of the attractive and repulsive forces being equal
which translates to the net force being zero.
The overall energy at the exact point of bonding is at the minimum which is
to allow easy transfer or sharing of electrons in the formation of a compound.
Read more on https://brainly.com/question/18258856
Which of the following describes and an atom that is neutral?
A) 15 protons, 14 neutrons, and 14 electrons
B) 15 protons, 14 neutrons, and 15 electrons
C) 15 protons, 15 neutrons, and 14 electrons
D) 15 protons, 14 neutrons, and 16 electrons
Answer:
The answer is B
Explanation:
Protons and electrons have to be equal numbers for it to be neutral
Answer:b
Explanation:
Calculate the number of moles in 5.37 x 10 19 atoms of Iron.
*
Answer:
Answer below:)
Explanation:
5.37 * 10^19 atoms of Iron (mol/6.022 *10^23)= 8.92 *10^-5
P4 + 302 → 2P203
what type of chemical equation is this?
Answer:
This is an oxidation-reduction (redox) reaction
Explanation:
P4
O2
Names: Dioxygen source: wikidata, accessed: 2019-09-07, Oxygen source: ICSC, accessed: 2019-09-04source: wikidata, accessed: 2019-09-07, Oxygen (liquefied) source: ICSC, accessed: 2019-09-04
Appearance: Odourless compressed gas source: ICSC, accessed: 2019-09-04; Liquefied gas. colourless-to-blue extremely cold liquid source: ICSC, accessed: 2019-09-04
Products:
P2O3
Names: Phosphorus trioxide source: wikipedia, accessed: 2019-09-27, Phosphorus(III) oxide source: wikipedia, accessed: 2019-09-27, Phosphorus sesquioxide source: wikipedia, accessed: 2019-09-27
Appearance: Colourless monoclinic crystals or liquid source: wikipedia, accessed: 2019-09-27
Describe the size of our Sun in relation to other stars and state the heaviest element that a star the size of ours would likely produce?
Answer:
Our sun is an averaged size star compare to other stars.. And the Iron are the heaviest element they can form.
Answer:
Our sun is an averaged size star compare to other stars.. And the Iron are the heaviest element they can form.
What would most likely happen to the motion of the planets without the force of gravity from the Sun?
The planets would continue to move in large ellipses.
The planets would drift away from the Sun into outer space.
The planets would slow down, eventually stopping all motion.
The planets would gradually make smaller and smaller ellipses.
Answer:
the planets would drift away from the sun into outer space
Explanation:
All celestial objects are attracted to each Other by gravity
Answer:
The planets would drift away from the Sun into outer space.
Explanation:
i need help with this please help!
Answer: the answer is think it yourself
Explanation:
Which particle would settle quickly?
a low-density sediment
an irregularly shaped sediment
a large sediment
a small sediment
What is the mass number of 199F?
Answer:
fluorine
Explanation:
hope it helps
An ideal gas system undergoes an isovolumetric process in which 20J of energy is added as heat to the gas. What is the change in the systems internal energy
Answer:
the change in the system internal energy is 20 J
Explanation:
The computation of the change in the system internal energy is as follows:
Since the volume remains constant so the work done would be zero
Now the change in the internal energy is
= Heat given to system - work done
= 20 J - 0
= 20 J
hence, the change in the system internal energy is 20 J
The same is to be considered
At what temperature will 5 g of Cl2 exert a pressure of 900 mmHg at a volume of .75 L?
The temperature : 154.73 K
Further explanationGiven
mass = m = 5 g of Cl2
P = 900 mmHg = 1,18421 atm
V = 0.75 L
Required
Temperature
Solution
mol Cl2 = mass : MW = 5 : 71 = 0.07
Ideal gas law : PV = nRT
P = pressure, atm
V = volume, liter
n = number of moles
R = gas constant = 0.082 L.atm / mol K
T = temperature, Kelvin
T = PV/nR
Input the value :
T = 1.18421 x 0.75 / 0.07 x 0.082
T = 154.73 K
What is the molarity of a solution in which 0.321 g of calcium chloride is dissolved in 1.45 L water?
Answer:
Molarity = 0.002 M
Explanation:
Given data:
Mass of calcium chloride = 0.321 g
Volume of water = 1.45 L
Molarity of solution = ?
Solution:
Molarity = number of moles / volume in litter.
We will calculate the number of moles of calcium chloride first.
Number of moles = mass/molar mass
Number of moles = 0.321 g/ 110.98 g/mol
Number of moles = 0.003 mol
Molarity:
Molarity = 0.003 mol / 1.45 L
Molarity = 0.002 M
Write the atomic number of the element with the following electronic configuration
1s2 2s2 2p6 3s2 3p6 3d7 4s2
Answer:
Atomic Number: 27 (Co, Cobalt)
Explanation:
4s2 is before 3d7*
Is corona increasing or decreasing the albedo effect? Explain.
Answer:
corona is increasing
.......
Explanation:
.....
What is the function of each of these structures?
Differentiate between acids and bases on the basis of their pH values. Give an example of each type. keep it simple
Answer:
differences
Any compound with a pH value between zero to seven is considered acidic, whereas a pH value between seven to fourteen is a base. An acid is called a proton donor, while a base is called a proton acceptor (Kolb, 1978).
examples are:
baking soda is basic (pH = 9.0).
Orange juice is mildly acidic (pH = approximately 3.5)
The environment in your stomach is highly acidic (pH = 1 to 2).
Explanation:
hope that helps.... thanks
Name chemical changes in the chemical given below
boiling of water
curdling of milk
photosynthesis
melting of wax
Explanation:
boiling of water - Physical changes
curdling of milk - Chemical changes
photosynthesis - Chemical changes
melting of wax - Physical changes
A physical change is a change that alters the physical properties of matter particularly the form and state. In many of such cases, the change is easily reversible.
Examples are boiling of water and melting of wax
A chemical change is a change in which a new kind of matter is formed. It is always accompanied by energy changes. The process is not easily reversible.
Examples are curdling of milk and photosynthesis.
Units obtained by combining Sl units are called derived units.
true or false
Answer:
True
Explanation:
Units obtained by combining SI units are called derived units.
Fundamental units are base units and these units are:
Length (m)Time (s)MassNumber of moles TemperatureCurrentDerived units are a combination of one or more fundamental units.
For example:
Speed = [tex]\frac{distance}{time }[/tex]
The unit of speed is m/s and this obtained from length and time
whats happening to the toy
The toy is being squished
Answer and Explanation:
I think it's balanced only if they are using the same force. If they are balanced then it stays in place but if they are not it moves in the direction that has the most force...
PLEASE HELP ME QUICKLY (select all that apply) Enzymes made by extremophiles can be harvested and used in everyday applications. These uses include
making laundry detergents.
making dish detergents.
recycling old tires.
de-hairing hides.
making paper.
Answer:
A, B, D, E
Explanation:
did it on edg
Answer:
A. Making laundry detergent
B. Making dish detergent
D. De-hairing hides
E. Making paper
Explanation:
What do these words mean ?
a) filtrate
b) residue
I will give him or her brilliant and thank you
I need small and right answer.
Answer:
a) filtrate: a liquid which has passed through a filter.
Explanation:
the other one didnt pop up
Rolf prepares four solutions using different solutes as shown in the table below.
Which solution is unsaturated?
Solution A
Solution B
Solution C
Solution D
Answer:
It's A
Explanation: