Unit 2 Test

Front

What is a heterogeneous mixture?

Back

A mixture where the components are not uniformly distributed, and different parts can be seen, such as sand and salt.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout, such as saltwater.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus of an atom.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom that has no charge.

Front

What is a proton?

Back

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

Front

What is an electron?

Back

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

Front

How do you calculate the mass number of an atom?

Back

Add the number of protons and neutrons together.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and determine the atom's charge.

Front

What is a compound?

Back

A substance formed when two or more elements chemically bond together.