G5A Science: Elements

The smallest unit of an element that retains that element's properties.

• electron

• atom

• proton

• neutron

The particle in an atom that has a negative charge.

• proton

• neutron

• electron

• atom

A substance that chemical reactions can't break down into something simpler.

• element

• compound

• silver

• silicon

In the nucleus of an atom, a particle with NO electrical charge.

• proton

• neutron

• electron

• atom

The number of protons in the nucleus.

• atomic number

• atomic mass

• ions

• isotope

The number of protos PLUS neutrons.

• atomic number

• atomic mass

• atomic density

• atomic energy

The center of an atom.

• neutron

• nucleus

• proton

• moron

An element that is shiny, ductile and can conduct energy.

• metal

• non-metal

• metalloid

Two or more atoms that are joined into one particle.

• neutron

• molecule

• atom

• element

In the nucleus of an atom, a particle with a positive charge.

• Proton

• neutron

• electron

• ion