Atomic Structure

What element is represented by the symbol Na?

• Nitrogen

• Sodium

• Neon

• Sulfur

What is the symbol for the element Chlorine?

• Cl

• CL

• Ci

• C

What is the atomic number of oxygen?

• 8

• 16

• 7

• 14

What element has 12 protons?

• Magnesium (Mg)

• Silicon (Si)

• Carbon (C)

• Sulfur (S)

How many protons does Aluminum have?

• 13

• 26

• 27

• 14

How many electrons does Phosphorus have?

• 15

• 30

• 31

• 16

How many neutrons does the element K have?

• 39

• 19

• 20

• 36

If an element has 6 protons and 6 neutrons what is the mass number?

• 12

• 6

• 36

• You can't figure out the mass number

What is the one thing that determines the name of the element?

• number of protons

• number of neutrons

• number of electrons

What particles are found in the nucleus of an atom?

• protons only

• neutrons only

• protons and electrons

• protons and neutrons