Ions

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the charge of a sodium ion (Group 1)?

Back

+1

Front

What happens to an atom when it gains electrons?

Back

It becomes negatively charged.

Front

What is the charge of an oxide ion?

Back

-2

Front

Which group of elements typically forms negative ions by gaining electrons?

Back

Group 15 and Group 16 elements.

Front

What is the charge of a beryllium ion?

Back

+2

Front

What is the charge of a nitrogen ion?

Back

-3

Front

How do you determine the charge of an ion from its group number?

Back

Elements in Group 1 lose 1 electron (+1), Group 2 lose 2 electrons (+2), Group 15 gain 3 electrons (-3), and Group 16 gain 2 electrons (-2).

Front

What is a cation?

Back

A cation is a positively charged ion, formed by the loss of electrons.

Front

What is an anion?

Back

An anion is a negatively charged ion, formed by the gain of electrons.