Open Sci Ed 7.1

Front

What are subscripts in a chemical formula?

Back

Subscripts are the small numbers written to the lower right of an element symbol in a chemical formula that indicate the number of atoms of that element in a molecule.

Front

Which state of matter has the most energy?

Back

Gas particles have more energy than solid particles.

Front

What is the melting point of a substance?

Back

The melting point is the temperature at which a substance changes from solid to liquid.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is a chemical reaction?

Back

A chemical reaction is a process where new substances are formed through the rearrangement of atoms.

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 is the boiling point?

Back

The boiling point is the temperature at which a liquid turns into a gas.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an oxidizer?

Back

An oxidizer is a substance that can cause or enhance the combustion of other materials.

Front

What does flammable mean?

Back

Flammable means that a substance can easily catch fire and burn.