Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons in order to have eight electrons in their outer shell, achieving a stable electron configuration.

Front

What is the 2n² rule?

Back

The 2n² rule is a formula used to determine the maximum number of electrons that can occupy a shell in an atom, where 'n' is the shell level (1, 2, 3, etc.).

Front

How do you calculate the number of neutrons in an atom?

Back

To find the number of neutrons, subtract the atomic number from the atomic mass: Neutrons = Atomic Mass - Atomic Number.

Front

If an atom has 6 protons, how many electrons does it have?

Back

If an atom has 6 protons, it has 6 electrons, as the number of protons equals the number of electrons in a neutral atom.

Front

What is the maximum number of electrons in the first shell?

Back

The maximum number of electrons in the first shell is 2.

Front

What is the maximum number of electrons in the second shell?

Back

The maximum number of electrons in the second shell is 8.

Front

What is the maximum number of electrons in the third shell?

Back

The maximum number of electrons in the third shell is 18.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an atom's isotopes, measured in atomic mass units (amu).

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.