Electron Unit Test Review

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, represented by a series of numbers and letters (e.g., 1s² 2s² 2p⁶).

Front

What is the electron configuration for an atom with 23 electrons?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵.

Front

How many valence electrons does an atom have if its electron configuration ends in 's²p³'?

Back

5 valence electrons.

Front

What is the maximum number of electrons that can occupy the first energy level (n=1)?

Back

2 electrons.

Front

What is the maximum number of electrons that can occupy the second energy level (n=2)?

Back

8 electrons.

Front

What is the highest occupied energy level in an atom with the electron configuration 1s² 2s² 2p⁶ 3s²?

Back

3.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

Which two elements are exceptions to the Octet Rule and only need 2 valence electrons?

Back

Hydrogen (H) and Helium (He).

Front

What is the Octet Rule?

Back

Atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

What is the significance of the electron configuration 1s² 2s² 2p⁶?

Back

It indicates a stable electron arrangement, corresponding to the noble gas configuration of Neon.