Midterm Review Chemistry

Front

What is the name for the combination of Potassium and Nitrogen?

Back

Potassium Nitride (K3N)

Front

What is matter?

Back

Anything that has mass and takes up space.

Front

An atom has 10 protons, 15 neutrons and 10 electrons. What is its mass?

Back

25 (mass = protons + neutrons)

Front

What do you call an atom with a different number of NEUTRONS than usual?

Back

Isotope

Front

Which of these animals is most closely related to Whales?

Back

Hippos

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

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.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.