Atoms and Ions

Ions are particles with a neutral charge.

• True

• False

Ions can be formed by single atoms.

• True

• False

Ions can be formed by groups of atoms.

• True

• False

Ions are formed when _________ are gained or lost by an atom.

An atom that gains an electron will form a __________ charged ion.

An atom that loses an electron will form a __________ charged ion.

What must happen to an oxygen atom form an O^2- ion.

• It has lost an electron.

• It has gained an electron.

• It has lost two electrons.

• It has gained two electrons.

What must happen to a sodium atom form an Na⁺ ion.

• It has lost an electron.

• It has gained an electron.

• It has lost two electrons.

• It has gained two electrons.

A magnsium atom loses two electrons. What type of ion will it form?

• Mg^-

• Mg^2-

• Mg⁺

• Mg²⁺

A bromine atom loses an electron. What type of ion will it form?

• Br^-

• Br^2-

• Br⁺

• Br²⁺