The Periodic Table

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

The blue atoms are called 

• metals
• nonmetals
• metalloids
• noble gases

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The atoms along the staircase are called 

• metals
• nonmetals
• metalloids
• noble gases

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In the modern periodic table elements are arranged by:

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

Which element is a metalloid?

• H

• Re

• Ne

• B

Which is an alkali metal?

• Magnesium
• Iron
• Sodium
• Europium

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Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

The atomic number tells you what?

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

What is the chemical symbol for sodium?

• S

• So

• Na

• K

How many protons are in a nitrogen atom?

• 5

• 7

• 14

• 28

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