Chemistry Post Test Review

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

All of the elements in a period have the same number of _____.

• energy levels

• valence electrons

• protons

• electrons

Tags

NGSS.HS-PS1-1

All of the elements in a group have the same number of _____.

• energy levels

• valence electrons

• protons

• electrons

Tags

NGSS.HS-PS1-1

What is the name of this element?

• Helium
• Hydrogen
• Argon
• Silver

Tags

NGSS.HS-PS1-1

Which of the following is a property of metals

• Malleable (can be hammered)

• Dull

• Brittle

• Nonconductive (does not conduct electricity)

Look up element [He]2s² 2p¹ . Then, look up its mass on the periodic table. Which is correct?

• Atomic # = 5

  Mass # = 11

  P=5, N=5, E=8

• Atomic #=11

  Mass #=5

  P=5, N=6, E=5

• Atomic #= 3

  Mass# = 5

  P=11, N=11, E=11

• Atomic #=5

  Mass#=11

  P=5, N=6, E=5

Tags

NGSS.HS-PS1-1

In a water molecule, there are _____ around the oxygen.

• Two single bonds, two unshared pairs

• Two single bonds, four unshared pairs

• Two double bonds

• Two double bonds, two unshared pairs

Which would have the largest radius?

• Oxygen

• Calcium

• Nitrogen

• Magnesium

Tags

NGSS.HS-PS1-1

If you have 5 grams of CO₂, how many moles is this. C=12, O=16.

• 0.11 mol

• 8.8 mol

• 0.18 mol

• 5.6 mol

What is the molar ratio? ___ Al + ___ Cl₂ --> ___ AlCl₃

• 1:1:1

• 2:3:3

• 2:3:2

• 3:2:2

Tags

NGSS.HS-PS1-7