Atomic Theory and Periodic Table Vocab

Front

What are electrons?

Back

Negatively charged particles.

Front

What charge do neutrons have?

Back

They have no charge.

Front

What is an electron cloud?

Back

A region around the nucleus occupied by electrons.

Front

What is a neutral charge?

Back

A charge with equal numbers of protons and electrons.

Front

What is the nucleus of an atom?

Back

The central part of an atom containing protons and neutrons.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

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 the mass number?

Back

The total number of protons and neutrons in an atom's nucleus.

Front

What is an isotope?

Back

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

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.