Quick Check - Atom

Front

What are the three particles that make up an atom?

Back

Protons, neutrons, and electrons.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance, such as melting butter.

Front

True or False: Isotopes are atoms of the same element that differ in mass number and number of neutrons.

Back

True.

Front

What is the charge of a nitrogen ion?

Back

-3.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as burning paper.

Front

Define an atom.

Back

The smallest unit of matter that retains the properties of an element.

Front

What is a proton?

Back

A positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutral particle found in the nucleus of an atom.

Front

What is an electron?

Back

A negatively charged particle that orbits the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.