Atoms Vocabulary Flashcard

Front

What is the center of an atom where most of its mass and positive charge is concentrated?

Back

The nucleus.

Front

What do you call a substance that consists of only one type of atom?

Back

An element.

Front

What is formed when two or more atoms are held together by covalent bonds and act as a unit?

Back

A molecule.

Front

What is the name of the negatively charged particle that occupies the space in an atom outside the nucleus?

Back

An electron.

Front

What type of charged particle is a proton?

Back

Positively charged.

Front

What is the smallest unit of an element that retains the properties of that element?

Back

An atom.

Front

What is a substance made of two or more different types of atoms bonded together?

Back

A compound.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What is the term for the number of protons in the nucleus of an atom?

Back

Atomic number.

Front

What do you call the region around the nucleus where electrons are likely to be found?

Back

Electron cloud.