PHYSICAL SCIENCE CHEMISTRY REVIEW #1

Front

To find the average number of neutrons in an atom of an element, we ____.

Back

subtract the atomic number from the mass number.

Front

Acids have a pH ____.

Back

of 0 to below 7.

Front

Substances that have a definite volume and an indefinite shape are ____.

Back

liquids.

Front

Acids turn litmus indicators ____ and bases turn litmus indicators ____.

Back

red, blue.

Front

This substance is _____ (acidic or basic).

Back

basic (alkaline).

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the pH range of neutral substances?

Back

A pH of 7.

Front

What happens to the pH of a solution when an acid is added?

Back

The pH decreases.

Front

What happens to the pH of a solution when a base is added?

Back

The pH increases.