UCEA C2 Periodic Table

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

In the modern periodic table elements are arranged by:

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

The atomic number tells you what?

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

Elements which are shiny, conduct electricity and heat are called

• metal
• nonmetal
• metalloid
• nonexistent

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Which is a halogen?

• Helium
• Chlorine
• Oxygen
• Neptune

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Which is an alkali metal?

• Magnesium
• Iron
• Sodium
• Europium

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How did Mendeleev arrange the elements?

• alphabetical 
• density
• melting point
• atomic mass

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The horizontal row on the periodic table is called a

• group
• family
• period
• atomic number

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Dimitri found that there was a pattern of properties that repeated every ____ elements.

• 2
• 4
• 5
• 7

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A vertical column is called...

• group
• tower
• period
• crew

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