Practice Test Atoms

Multiple Choice

The atomic number represents

• # of neutrons

• # of electrons

• elements

• # of protons

Multiple Choice

Particles that are found in the atomic nucleus are:

• Protons and electrons

• Protons and neutrons

• Neutrons and electrons

• Protons, neutrons and electrons

Multiple Choice

An element is defined by the number of:

• Ions

• Electrons

• Protons

• Chemical bonds

Multiple Choice

What does the atomic number represent?

• number of protons

• total number of electrons, protons, and neutrons

• number of neutrons

• total number of electrons and protons combined

Multiple Choice

What is the significance of the periodic table of elements?

• It lists all the different metals known to humans

• It predicts and lists all the chemical elements in the universe

Multiple Choice

If only one type of atom makes up a substance, what can you call this substance?

• a proton

• a compound

• an element

• a neutron

Multiple Choice

What do electrons in the same shell have in common?

• They have the same amount of energy

• They are all positively charged

Multiple Choice

What two types of particles exist within an atomic nucleus?

• Protons and neutrons

• Protons and neutrinos

Multiple Choice

Oxygen has an atomic number of 8. What can you conclude from this fact?

• An atom of oxygen has 8 protons.

• An atom of oxygen weighs 8 grams.

Multiple Choice

In the following diagram, what does the number 12 represent?

• An atomic mass

• A chemical symbol