Atoms and the Periodic Table

Front

Where is most of the mass of an atom found?

Back

nucleus

Front

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is

Back

56

Front

Each row in the periodic table ends with a: metal, nonmetal, metalloid, noble gas

Back

noble gas

Front

Dot diagrams are used to represent?

Back

outer level electrons

Front

Particles of matter that make up protons and neutrons are

Back

quarks

Front

A chemical symbol represents the ____________ of an element.

Back

name

Front

Horizontal rows of the periodic table are called

Back

periods

Front

Atoms of the same element with different numbers of neutrons are called

Back

isotopes

Front

A particle that moves around the nucleus is a(n):
- electron
- proton
- neutron
- quark

Back

electron

Front

Protons are parts of an atom that are inside the nucleus and hold what type of charge?

Back

positive