As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more nuetrons

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As you move across the periodic table atoms tend to get smaller because, ______________.

• the atoms have more mass.
• the atoms have less mass
• the atoms have more protons.
• the atoms have less electrons.

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Metals are good conductors of heat and electricity.

• true
• false

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Which periodic group has the smallest atomic radius?

• Alkali metals
• Halogens
• Noble Gases
• Transition metals

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NGSS.HS-PS1-1

Atomic radius generally increases as we move __________.  

• down a group and from right to left across a period 
• up a group and from left to right across a period 
• down a group and from left to right across a period 
• up a group and from right to left across a period 

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NGSS.HS-PS1-1

The more protons there are, the  ____ .

• Weaker the pull
• Smaller the electrons
• Stronger the pull
• The bigger the electrons

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Which element's atom is larger? Nitrogen or Phosphorus?

• Nitrogen

• Phosphorus

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As you move ______ a group, more energy levels are added, which increases the size of the atom

• down

• up

• diagonal

• away

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Within periods on the periodic table: Size decreases as you go down a group

• Flase

• True

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NGSS.HS-PS1-1

Which element's atom is the smallest?

• Rhodium

• Silver

• Cadmium

• Tin

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