Periodic Table Unit Test Review

Front

What does the law of conservation of matter state?

Back

Matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

Where are electrons located in an atom?

Back

Electrons are located orbiting the nucleus of the atom.

Front

What is a compound?

Back

A compound is a type of matter that is composed of two or more elements that are chemically combined.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What are the three main subatomic particles?

Back

The three main subatomic particles are protons (positive charge), neutrons (no charge), and electrons (negative charge).

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a combination of substances that are not uniformly distributed, meaning you can see the different components.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not visible.

Front

What is the atomic number of an element?

Back

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

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus of an atom and contribute to its mass.