Comprehensive Phy. Science Review

Front

What does the ion S^-2 represent?

Back

Sulfur gains 2 electrons.

Front

What is the pH of a solution that is considered acidic?

Back

A solution with a pH of less than 7 is considered acidic.

Front

What is the mass number of an atom?

Back

The mass number is the sum of the protons and neutrons in the nucleus of that atom.

Front

What does Newton's 3rd Law state?

Back

For every action, there is an equal and opposite reaction.

Front

What happens to a sodium atom when it loses an electron?

Back

It becomes positively charged.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

What is the difference between an acid and a base?

Back

Acids donate protons (H+) in a solution, while bases accept protons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.

Front

What is the Law of Universal Gravitation?

Back

It states that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.