The Nuclear Atom

Front

What are valence electrons?

Back

Electrons in the outermost energy level of an atom.

Front

What are positively charged particles located in the nucleus of an atom?

Back

Protons.

Front

What is the center of an atom called?

Back

Nucleus.

Front

What are the names of the particles in the nucleus?

Back

Protons and neutrons.

Front

What are neutrons?

Back

Neutral particles located in the nucleus of an atom.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.