Y2 Chemistry Revsion Quiz 1 (Chapter 3 and 4)

What is an ion?

• An atom with equal numbers of protons and electrons

• An atom with unequal numbers of protons and electrons

• A molecule with only neutrons

• A molecule with only electrons

Making an ion from an atom or molecule is called _______.

• ionization

• sublimation

• condensation

• deposition

A gas with lots of ions is called a _______.

• plasma

• liquid

• solid

• aerosol

Positive ions are called cations.

• True

• False

Elements in Group O or Group 8 (e.g. He, Ne, and Ar) are called _______.

• noble gases

• alkali metals

• halogens

• transition metals

Why are noble gases unreactive?

• They have full outer shells

• They have no electrons

• They have unstable electron distribution

• They are metals

Helium has a stable _______ while Ne and Ar have a stable _______.

• duplet; octet

• octet; duplet

• octet; octet

• duplet; duplet

Group O (or Group 8) elements are _______ – they exist as individual atoms.

• monatomic

• diatomic

• polyatomic

• ionic

Which atom has a stable duplet?

• He

• Ne

• Ar

What is an ion?

• An atom or group of atoms with a charge

• An atom with no charge

• A molecule with only protons

• A molecule with only electrons