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 a compound?

Back

A substance formed when two or more elements are chemically bonded together, like water (H2O).

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means, such as oxygen or gold.

Front

What is a metalloid?

Back

An element that has properties of both metals and nonmetals, such as silicon.

Front

What is a chemical change?

Back

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

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice.

Front

What is an atom?

Back

The smallest particle of an element that retains the properties of that element.

Front

How many protons does a carbon atom have?

Back

6 protons.

Front

What is the atomic number?

Back

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