Atomic Theory and Periodic Table Vocab

Front

What are nonmetals?

Back

Elements that are generally gases to the right of the stairstep line.

Front

What determines the electrical property of an atom?

Back

The balance between its positively charged protons and negatively charged electrons, known as the charge.

Front

What is atomic mass?

Back

The total number of protons and neutrons in an atom.

Front

What indicates a positive charge in an atom?

Back

Having more protons than electrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom containing protons and neutrons.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals, located along the stairstep line.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is an electron?

Back

A negatively charged particle that orbits the nucleus of an atom.

Front

What is a proton?

Back

A positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A particle with no charge found in the nucleus of an atom.