Atomic Theory and Atoms

Front

In a chemical reaction, the chemicals at the start of the reaction are called the _____

Back

reactants

Front

The ________ is the small area in the center of an atom in which most of an atom's mass and positive charge is concentrated.

Back

nucleus

Front

A substance produced during a chemical reaction is called a _____

Back

Product

Front

What is an atomic particle with one positive charge?

Back

a proton

Front

Where is the electron cloud located?

Back

Around the outside of the nucleus.

Front

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

Back

an atom

Front

What are negatively charged particles found in an atom?

Back

electrons

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 particles that make up the nucleus of an atom?

Back

protons and neutrons