Chapter 6/7 Review

What is a particle with one negative charge?

• neutron

• electron

• proton

• quark

What is a particle with one positive charge?

• neutron

• electron

• proton

• atom

What is a neutral particle found in the nucleus?

• neutron

• electron

• proton

• atom

What is an atom mostly made of?

• air

• empty space

• neutrons

• protons

What allowed scientists to see an individual atom for the first time?

• cathode ray tubes

• photographic plates

• compound microscopes

• scanning tunneling microscopes

An ion that has a negative charge is formed when an atom _____.

• loses neutrons

• loses electrons

• gains neutrons

• gains electrons

The ___ is determined by adding the number of protons and neutrons in an atom.

• average atomic mass

• atomic number

• mass number

• element

_____ are atoms of the same element that have different numbers of neutrons.

• Isotopes

• Ions

• Elements

• Mass numbers

An element's ___ and the number of protons in the nucleus of its atoms are always the same.

• atomic number

• average atomic mass

• mass number

• nuclear decay

_____ are formed when atoms gain or lose electrons.

• Isotopes

• Mass numbers

• Atomic numbers

• Ions