Module 16 Physical Science (15)

The smallest particle of an element that retains the element's properties.

• isotope
• atom
• element
• compound

The small, positively charged center of the atom.

• neutron
• nucleus
• quark
• atom

The proton's charge is:

• neurtral
• negative
• positve
• no charge

The neutron's charge is:

• neutral, no charge
• positive
• negative
• only partial

The electron's charge is:

• positive
• negative
• neutral, no charge
• partial only

Protons and neutrons are made up of smaller particals called

• neutronions
• positrons
• quarks
• quakes

The area around the nucleus of an atom, where electrons are most likely found.

• nucleus
• Rutherford's model
• electron cloud
• quark space

The number of protons in an atom's nucleus.

• atomic mass
• atomic number
• average atomic mass

The sum of the number of protons and the number of neutrons in the nucleus of the atom.

• atomic number
• mass number
• average atomic mass

Atoms of the same element that have different numbers of neutrons.

• quarks
• isotopes
• periods
• groups