Atoms and Molecules

Front

What are the three particles that make up an atom?

Back

Protons, neutrons, and electrons.

Front

What is a molecule?

Back

A molecule is made up of two or more atoms bonded together.

Front

What are elements made of?

Back

Elements are made of one type of atom.

Front

What is the central region of an atom called?

Back

The nucleus.

Front

Which part of an atom is positively charged?

Back

Protons.

Front

What is the charge of neutrons?

Back

Neutrons have no charge (they are neutral).

Front

What is the charge of electrons?

Back

Electrons are negatively charged.

Front

What is the periodic table?

Back

The periodic table is a chart that organizes all known elements by their atomic number.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the electron cloud?

Back

The electron cloud is the region around the nucleus where electrons are likely to be found.