Valence Electrons and Ions

Front

What are valence electrons?

Back

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

Front

How many valence electrons does Calcium (Ca) have?

Back

Calcium has 2 valence electrons.

Front

What is a cation?

Back

A cation is a positively charged ion that forms when an atom loses one or more electrons.

Front

What noble gas has the same electron configuration as a Calcium cation (Ca²⁺)?

Back

Argon (Ar) has the same electron configuration as a Calcium cation.

Front

What happens to an atom when it gains electrons?

Back

It becomes negatively charged, forming an anion.

Front

What is the significance of the period number in the periodic table?

Back

The period number indicates the number of electron shells an element has.

Front

How many valence electrons does Helium (He) have?

Back

Helium has 2 valence electrons.

Front

What is the Lewis Dot Structure?

Back

The Lewis Dot Structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist.

Front

What is the correct Lewis Dot Structure for Carbon (C)?

Back

Carbon should have 4 dots representing its 4 valence electrons.

Front

What is an anion?

Back

An anion is a negatively charged ion that forms when an atom gains one or more electrons.