Lesson Check - Electrons Conf of Ions(2024-2025)

Front

What is electron configuration?

Back

The distribution of electrons in an atom's orbitals, indicating how many electrons occupy each energy level and sublevel.

Front

What is the electron configuration of a neutral sodium atom?

Back

1s² 2s² 2p⁶ 3s¹.

Front

What does it mean for ions to be isoelectronic?

Back

Ions are isoelectronic when they have the same number of electrons and thus the same electron configuration.

Front

Which ion is isoelectronic with neon?

Back

O²⁻, F⁻, and Na⁺ are all isoelectronic with neon.

Front

What is the electron configuration of the sulfide ion (S²⁻)?

Back

1s² 2s² 2p⁶ 3s² 3p⁶, which is isoelectronic with argon.

Front

Why do atoms form ions?

Back

Atoms form ions to achieve a full valence shell, increasing their stability.

Front

What is the electron configuration of the sodium ion (Na⁺)?

Back

1s² 2s² 2p⁶.

Front

What is the significance of the valence shell in ion formation?

Back

The valence shell determines an atom's reactivity; atoms seek to fill or empty this shell to achieve stability.

Front

What is the electron configuration for an atom with 15 electrons?

Back

1s² 2s² 2p⁶ 3s² 3p³.

Front

How many electrons can the p sublevel hold?

Back

The p sublevel can hold a maximum of 6 electrons.