Periodic Table of Elements

A one or two letter abbreviation  used to represent an element is called a(n) ________

• chemical symbol
• element sign

Which element is found in period 3 group 2?

• Sodium (Na)
• Magnesium (Mg)
• Yttrium (Y)
• Boron (B)

Vertical (up and down) columns in the periodic table are called _________ of elements and have similar properties. 

• groups
• periods

One physical characteristic of metals is...

• Luster (shine)
• Weight
• All are gases. 

_________are not good conductors of heat or electricity.

• Metals
• Metalloids
• Nonmetals

The horizontal (left to right) rows on the periodic table are known as

• periods.
• atoms.
• groups or families.
• valence electrons.

All matter is made of

• atoms
• cells

The atomic number tells you what?

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

A neutron has a charge of

• +2
• No charge
• -1
• +1

What does the 1.00794 stand for?

• Hydrogen
• atomic number
• atomic mass
• atomic explosion