Chemistry Basics

Atoms are the basic unit of matter and the defining structure of elements.

• True

• False

Anything that takes up space and has mass is known as _______________.

• Matter

• Molecules

• Compounds

• Stuff

What are the positively charged particles in an atom?

• Protons

• Neutrons

• Electrons

Electrons have what charge?

• Negative

• Positive

• Neutral
   (No Charge)

Neutrons have what charge?

• Negative

• Positive

• Neutral
   (No Charge)

The nucleus of an atom is made up of...

• Protons and Neutrons

• Neutrons and Electrons

• Protons and Electrons

The image shows the periodic grid for POTASSIUM. What is Potassium's atomic number?

• 19

• 39

• 20

• Impossible to tell

The image shows the periodic grid for POTASSIUM. What is Potassium's atomic mass?

• 19

• 39

• 20

• Impossible to tell

A(n) ____________________ is a pure substance made of a single type of atom and cannot be broken down.

• Element

• Compound

• Molecule

• Mixture

What does the ATOMIC MASS tell us about an atom?

• Protons + Neutrons

• Protons + Electrons

• Neutrons + Electrons