What makes the atomic radius change along a period in the periodic table?
A. The increased atomic mass makes the atomic radius bigger.
B. More electrons in the valence shell make the radius bigger.
C. More electrons pair in orbitals, making the atomic radius smaller.
D. More protons in the nucleus pull the electrons in, making the
atomic radius smaller
Answer:
D
Explanation:
More protons in the nucleus pull the electrons in, making the atomic radius smaller. Therefore, the correct option is option D.
The atomic radius is determined by the nucleus's balance between the attracting force of positively charged protons and the repelling force of electrons.
The most crucial element in calculating the average atomic radius is not Option A. Although atomic mass typically increases with time, increasing nuclear charge has a greater impact on atomic size.
Over time, Option B has no discernible impact on atomic radius. Although the number of valence electrons changes over time, increasing nuclear charge has the biggest impact on atomic size. The valence shell is the outermost electron shell.
The gradual decrease in atomic radius is unaffected by Option C. The most frequent electron pairing occurs within orbitals of the same energy level, and it has little impact on atomic size over a period.
Therefore, the correct option is option D.
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1. How is energy transferred within and between systems?
table salt has a density of 2.16g/cm3. a cylindrical box holds 4.25 kg of salt. what is the volume, in cm3 occupied by the salt in the box?
Given parameters:
Density of table salt = 2.16g/cm³
Mass of table salt = 4.25kg = [tex]\frac{0.00425}{2.16}[/tex][tex]\frac{0.00425}{2.16}[/tex]g (1000g = 1kg)
Unknown:
Volume of table salt = ?
Solution:
To find the volume of the table salt, let us state the relationship between density, mass and volume.
Density is the mass per unit volume of substance.
Density = [tex]\frac{mass}{volume}[/tex]
Since the unknown is volume;
Density x volume = mass
Volume = [tex]\frac{mass}{density}[/tex]
Input the parameters and solve';
Volume = [tex]\frac{0.000425}{2.16}[/tex] = 1.97 x 10⁻³cm³
Volume of the table salt is 1.97 x 10⁻³cm³
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Answer:
4 Ethanol has a boiling point of 89 C at standard pressure.
In order to survive, plants absorb sunlight, water, and nutrients from the soil. What property is this?
Plants are unique organisms that can absorb nutrients and water through their root system, as well as carbon dioxide from the atmosphere. Soil quality and climate are the major determinants of plant distribution and growth.
a boy and a girl are pulling a heavy crate at the same time with 7 units of force each what is the net force on the object is the object balanced or unbalanced
Answer:
Net force= 0N or 0units
Object is balanced
Explanation:
Net force refers to all the sum total of all forces acting upon an object. In this case, a boy and a girl are pulling a heavy crate at the same time with 7 units of force each.
- This means that the force exerted on the crate by the boy is F1 = 7units
- The force exerted on the crate by the girl is F2 = -7units
Hence, the Fnet = F1 + F2
Fnet = 7 + (-7)
Fnet = 0 units
An object which possess a net force is said to be unbalanced, while an object with no net force i.e 0 units or N. Hence, the heavy crate in this case being pulled by a net force of 0units is BALANCED.
The force applied on the object is a balanced force since the object is at equilibrium.
The given parameters;
force applied by the boy, F₁ = 7 N
force applied by the girl, F₂ = 7 N
The net force on the object is the resultant of the two equal both opposite directed force.
Let the boy's direction be positive
Let the girl's direction be negative
The resultant of the two forces is calculated as;
[tex]\Sigma F_x = F_1 + F_2\\\\\Sigma F_x = (7 \ N) + (-7 \ N)\\\\\Sigma F_x = 0[/tex]
Thus, the force applied on the object is a balanced force since the object is at equilibrium.
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I’m stuckkkkkk please help
Answer:
A
Explanation:
I think...........maybe
does changing the size of a substance affect its density
Answer:
yes
Explanation:
The distortion changing the shape of enzyme molecules which occurs at high temperatures is known as
Answer:
denaturing
Explanation:
enzyme denatures in extreme temperature and pH
Answer:
Denaturation
Explanation:
It change the shape of enzyme . It also occur in only high temperatures
"Given a block of frozen salt water, how could you separate
pure water from the salt using only a fire & stove? Please be
as specific as you can by mentioning PHASE CHANGES.
Answer: You could put the frozen block of ice on the stove and let it melt and eventually boil out leaving the salt behind
Explanation:
Nuclear power plants are very hazardous because their fuel and waste products are highly
radioactive.
a True
b. false
Answer:
the answer is A
Explanation:
This is very much true as seen by the fact that the people that work at nuclear power plants usually have to wear radiation suits.
Which item has the most thermal energy?
There are two kinds of mixtures, homogenous and heterogenous. Homogenous mixture is the mixture that has uniform composition, while heterogenous mixture does not have a uniform composition.
A. True
B. False
Answer:
True
Explanation:
Homo = same
Hetero = different
Is 2AI+3O2= 2AI2O3 balanced or unbalanced
Answer:
balance
Explanation:
because you just add together but they just switch the 2 and 3
2. An object has a mass of 10 grams and a volume of 5 cm3. What is the density of the object?
Answer:
The answer is 2 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
We have
[tex]density = \frac{10}{5} \\ [/tex]
We have the final answer as
2 g/cm³Hope this helps you
Which statement describes what is happening at the plate boundary in this section of a tectonic map?
Two plates are sliding past each other.
Two continental plates are colliding.
An oceanic plate is subducting.
The seafloor is spreading.
Answer a, is the answer i guess also guys take up the answers so no one else can get annoyed
Answer:
A
Explanation:
I took the quiz and I believe this was the correct answer.
What is the density of an objects with a volume of 4.3 mL and a mass of 8.32g
Answer:
The answer is 1.93 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume}\\[/tex]
From the question
mass = 8.32 g
volume = 4.3 mL
So we have
[tex]density = \frac{8.32}{4.3} \\ = 1.934883720...[/tex]
We have the final answer as
1.93 g/mLHope this helps you
The bowling ball weighs 3.6 kg and the bowling pin weighs 1.36 kg. If the mass of the bowling ball is increased to 7.2 kg and the bowling pin is increased to 2.7 kg, what is the effect on the force between them? Group of answer choices
Answer:
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
Explanation:
The force between the ball and the bowling pin is given by Newton's Gravitational Law, as follows:
F = Gm₁m₂/r²
where,
F = Force
G = Gravitational Constant
m₁ = mass of ball
m₂ = mass of bowling pin
r = distance between ball and bowling pin
So, initially:
F₁ = G(3.6 kg)(1.36 kg)/r²
F₁ = 4.896 G/r²
After increase in masses:
F₂ = G(7.2 kg)(2.7 kg)/r²
F₂ = 19.44 G/r²
F₂/F₁ = (19.44 Gr²)/(4.896 G/r²)
F₂ = 3.97 F₁
Hence, the force will be increased by a factor of 3.97
Are atoms the smallest particles we know about, or are there smaller ones?
Answer:
subatomic particles are smaller then atoms
My atomic number is 32. I am a-
Answer:
please mark brainliest!
Explanation:
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.
How many significant figures in 0.002010 ?
Whose personal story did you read (if you read several, pick your favorite)? What was the most interesting or eye-opening part of that person's story?
Pleaseeee help neeeeee
Answer:
B
Explanation:
Condensation happen when water is warmed up in room temperature against a cold surface like water vapor
You run from your house to the grocery store in 1.0 minute, and the store is 300 meters from your house. What is your average speed in meters per second for the trip?
Answer: 3
Explanation:
What are the 3 components of an electromagnet?
Answer:
An electromagnet is a coil of wire wrapped around a bar of iron or other ferromagnetic material. When electric current flows through the wire, it causes the coil and iron bar to become magnetized. An electromagnet has north and south magnetic poles and a magnetic field.
Explanation:
The three main components of an electromagnet are the iron core, copper wire, and an electricity source.
What is an electromagnet?An electromagnet is a magnet in which a coiled or wrapped wire is given electricity. When Current is given to this wire, it acts like a magnet. An electromagnet is used to create a magnetic field.
The three main parts of the electromagnet are the iron core, that is the magnet, which is a small round, or square brick-like. The wire, wire, is made up of copper. The electricity source, by which electricity is given to the electromagnet.
Examples of electromagnets are induction cookers, doorbell rings, etc. They are controllable and adjustable magnets and are used in most electric appliances.
Thus, the three parts are the iron core, copper wire, and an electricity source.
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Grade 8 SCIENCE BASELINE - 2020-2021 Question: 1-39
To bring heavy boxes down a fight of stairs. Tyrone uses a camp. He shoes the boxes down the ramp. The movement transforms ce type d energy into the fons made togos
the way that most of the energy is transformed?
potential energy into chemical energy and mechanical energy
o potential energy into light energy and mechanical energy
o potential energy into sound and chemical energy
O potential energy into heat and kinetic energy
Answer:
This question is unclear, the comprehensive question is:
To bring heavy boxes down a flight of stairs, Tyrone uses a ramp. He slides the boxes down the ramp. The movement transforms one type of energy into two other forms. Which of the following describes the way that most of the energy is transformed:
ANSWER:
Potential energy into heat and kinetic energy
Explanation:
According to this question, a ramp is used to bring heavy boxes down a flight of stairs. Tyrone does this by sliding the boxes down the ramp. The ramp is in a fixed position i.e. not moving, meaning the energy in the ramp is POTENTIAL ENERGY.
However, when the boxes slide down the ramp, the potential energy transforms to energy due to motion called KINETIC ENERGY, and HEAT ENERGY, which is caused by the friction between the boxes and the ramp.
Therefore, the potential energy of the ramp is transformed to kinetic energy in the boxes and heat energy.
the two sides of the equation should be
Answer:
Hey mate.....
Explanation:
This is ur answer.....
---> Equal
hope it helps,
mark me as the brainliest,
Follow me......
Answer:
I am not quite sure if this is what you are looking for but each side of the equation should be equivalent.
Measure of the energy
released during an
earthquake.
Answer:
The magnitude of an earthquake, usually expressed by the Richter Scale, is a measure of the amplitude of the seismic waves
Explanation: The moment magnitude of an earthquake is a measure of the amount of energy released - an amount that can be estimated from seismograph readings
give me example of analyze
Answer: analyze the question so that you can get a correct answer
Explanation:
Which refers to the type of chemical bond that involves the transfer of electrons between atoms? O metallic O polar covalent Oionic O covalent
Answer:
C-
Ionic
Explanation:
Just did the quiz
The bonding occurs between the valence electron of an atom. The ionic bond involves the transfer of electrons between atoms. Thus, option c is correct.
What is an ionic bond?A chemical bond that involves the complete transfer of electron/s from one element to another in a molecule or compound is an ionic bond.
The ionic bonds comprise cations that gave the electron to another element called the anion that gained or accepted the electron. This results in an attractive force between them to form a bond.
The positive and negative charges attract one another which leads to the formation of the ionic bond. The most common example is NaCl in which sodium has a positive and chloride has a negative charge.
Therefore, option c. ionic bond involves the transfer of electrons.
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