Atomic Theory and Periodic Table Vocab

Front

What are metalloids?

Back

Elements with properties of both metals and non-metals on the stairstep line.

Front

Electrons are:

Back

Negatively charged particles.

Front

An electron cloud is:

Back

A region around the nucleus occupied by electrons.

Front

Neutrons are subatomic particles that have which charge?

Back

They have no charge.

Front

What is atomic number?

Back

The number of protons in an atom's nucleus.

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom that contains protons and neutrons.

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number.

Front

What are alkali metals?

Back

The group of elements in the first column of the periodic table, known for being highly reactive.