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3 years ago

State the three rules that define how electrons are arranged in atoms

2 answers:

8 0

3 rules that define how electrons can be arranged in an atom's orbital. All orbitals related to an energy level are of equal energy. Single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals.

Hunter-Best [27]3 years ago

6 0

The three correct rules or principles are the Aufbau Principle, Hund’s Rule, and the Pauli Exclusion Principle. Aufbau’s Principle states that each electron orbits the lowest energy orbital. It also states that all orbitals related to an energy level are of equal energy. Hund’s Rule states that single electrons with the same spin must occupy each equal-energy orbital before additional electrons with opposite spins can occupy the same orbitals. And finally, the Pauli Exclusion Principle states that a maximum of two electrons may occupy a single orbital, but only if the electrons have opposite spins. Hope this helps.

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Why do substances with weak intermolecular forces form solids at low melting points?

Advocard [28]

To make any substance solid, molecules must come very close to each other. Substances with weak intermolecular forces have weak bonding. Hence to make their molecules come close to each other, we must provide low temperature.

7 0

3 years ago

Which of the following is NOT a method of transferring heat?

Eva8 [605]

The answer is Reduction. All three methods (convection, radiation, and conduction) are all ways of transferring heat. Convection is the transfer of heat by means of a medium such as air. Conduction is the transfer of heat from the contact of two surfaces at different temperatures. Radiation is the transfer of heat via electromagnetic waves.

Reduction is a chemical reaction that involves the gain of electrons. It is the opposite of oxidation which involves the loss of electrons.

5 0

3 years ago

What are the properties of aluminium and their use

Wewaii [24]

Answer: Answers are in bulleted lists.

Explanation: Aluminum...

has a low density
is non-toxic
has a high thermal conductivity
has excellent corrosion resistance
can be easily cast, whether it's machined or formed.

Uses:

Aeroplane Parts
Cans
Window frames
Beer kegs
Foils
Kitchen utensils

Have a great day! :)

6 0

2 years ago

Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water.

Marrrta [24]

Hello, this question is incomplete. The complete question would be:

"Write the balanced chemical equation for the following reaction.

Solid iron(III) oxide reacts with hydrogen gas to form solid iron and liquid water"

Answer:

Fe2O3 + 3 H2 = 2 Fe + 3 H2O

Explanation:

In a chemical reaction, the structure of atoms as chemical elements is unchanged. Atoms in one element do not become atoms in another element. There is also no loss or creation of new atoms. The number of atoms of the reagents must be equal to the number of atoms of the products. When this happens, we say that the chemical equation is balanced.

For this reason, we can state that the balanced chemical reaction where solid iron (III) oxide reacts with hydrogen gas to form solid iron and liquid water would be:

Fe2O3 + 3 H2 = 2 Fe + 3 H2O

5 0

3 years ago

When a gas is heated, _____. some of the absorbed energy is converted to potential energy and some is converted to kinetic energ

Evgesh-ka [11]

all of the absorbed energy is converted to kinetic energy

Explanation:

When a gas is heated, all of the absorbed energy is converted to kinetic energy. This is because, according to the kinetic theory of gases, the average kinetic energy of gases is directly proportional to temperature.

As the gas absorbs more heat, the potential energy it carries converted to kinetic energy.
Potential energy is the energy at rest of a body
Kinetic energy is the energy due to the motion of the particles of a medium.
As more heat is added to a body, the kinetic energy continues to increase significantly.
Eventually, all the absorbed energy is converted to kinetic energy as the gas expands more.

learn more:

Kinetic theory of matter brainly.com/question/12362857

#learnwithBrainly

8 0

4 years ago