Physical Science Final Exam

Front

What is the independent variable in an experiment?

Back

The variable that changes.

Front

Which category of elements typically forms positive ions?

Back

Metals.

Front

What is the charge of an aluminum ion with 13 protons and 10 electrons?

Back

3+.

Front

How do you calculate the mass number of an atom?

Back

Mass number = Protons + Neutrons.

Front

What is the mass number of an ion with 83 protons, 80 electrons, and 126 neutrons?

Back

209.

Front

What do acids begin with?

Back

H+.

Front

What do bases end with?

Back

OH-.

Front

What is a positive ion called?

Back

Cation.

Front

What is a negative ion called?

Back

Anion.

Front

What is the difference between an element and a compound?

Back

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