U4 CP Chem Electrons Review

Front

What is the electron configuration of a potassium ion (K⁺)?

Back

The electron configuration of a potassium ion (K⁺) is the same as that of argon (Ar), which is 1s² 2s² 2p⁶ 3s² 3p⁶.

Front

Which element in Period 4 has 5 valence electrons?

Back

Arsenic (As) has 5 valence electrons in Period 4.

Front

What is an orbital diagram?

Back

An orbital diagram is a visual representation of the electron configuration of an atom, using arrows to represent electrons in orbitals.

Front

What happens to an atom when it loses a valence electron?

Back

When an atom loses a valence electron, it becomes a positive ion (cation).

Front

What type of ion do barium atoms form?

Back

Barium atoms form a cation.

Front

Define valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the difference between a cation and an anion?

Back

A cation is a positively charged ion formed by losing electrons, while an anion is a negatively charged ion formed by gaining electrons.

Front

What is the significance of the periodic table in understanding electron configurations?

Back

The periodic table helps predict the electron configurations of elements based on their position, which indicates the number of valence electrons.

Front

What is the electron configuration for the element with atomic number 33?

Back

The electron configuration for arsenic (As, atomic number 33) is [Ar] 4s² 3d¹⁰ 4p³.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.