Week 6 Vocabulary practice Chemistry of Life: Atoms & Molecules

The smallest unit of matter that retains all of the chemical properties of an element.

• electron

• atom

• nucleus

• element

A substance that cannot be broken down into any other substance.

• electron

• atom

• nucleus

• element

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

• electron

• atom

• molecule

• element

Positively charged sub-atomic particle.

• electron

• proton

• nucleus

• neutron

Negatively charged sub-atomic particle.

• electron

• proton

• nucleus

• neutron

A uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus.

• electron

• proton

• nucleus

• neutron

The total mass of particles of matter in an atom.

• ion

• isotope

• atomic number

• atomic mass

An atom or group of atoms that bears one or more positive or negative electrical charges.

• ion

• isotope

• atomic number

• atomic mass

Outer shell electron is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.

• ion

• isotope

• valence electron

• atomic mass

A chemical bond wherein there is a transfer of an electron from one atom to another.

• ion

• covalent bond

• valence electron

• ionic bond