Part of an Atom/Periodic Table

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion

What period is Lead (Pb) in?

• 6

• 4

• Metals

• 4A

What category is silicon (Si) a part of?

• Metal

• Nonmetal

• Metalloid

• Halogens

How many electrons does Barium (Ba) have?

• 13

• 2

• 71

• 56

How many neutrons does Bromine (Br) have?

• 35

• 80

• 45

• 7

What period contains the element Plutonium (Pu)?

• 8

• 6

• 7

• Plutonium doesn't exist

The atomic number of an element tells the number of _____ in the nucleus of an atom of that element.

• protons
• neutrons
• electrons
• isotopes

What category is silicon (Si) a part of?

• Metal

• Nonmetal

• Metalloid

• Halogens

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes