PS Midterm

Front

What is matter?

Back

Any substance that takes up space or has mass.

Front

What is a pure substance containing only one kind of atom?

Back

Element.

Front

What charge will an atom have if it gains two electrons?

Back

-2.

Front

What properties of water does soap change?

Back

All of these (adhesion, cohesion, surface tension).

Front

In a chemical equation, what do the coefficients indicate?

Back

The number of molecules of each reactant used and the number of molecules of each product made.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

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

Front

What is a mixture?

Back

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

Front

What is the charge of a proton?

Back

+1.

Front

What is the charge of an electron?

Back

-1.