Lessons on Chemical Bonds

Chemical Reactions and Chemical Bonds

Multiple Choice

__C₆H₁₂O₆ + __O₂ --> __H₂O + __CO₂

• 1,6,6,6

• already balanced

• 1,6,1,6

• 2,12,12,12

Multiple Choice

How many sulfur atoms are present in this molecule?

• 4

• 3

• 12

• 1

Multiple Choice

What coefficient should go in the last blank space in order for the equation to be balanced?

• 1

• 2

• 3

• 4

Multiple Choice

BEFORE the equation is balanced, how many Hydrogen atoms are present on the reactant side?

• 6

• 2

• 12

• 8

Multiple Choice

A ____________is the force that holds atoms together in a compound.

• Chemical Formula
• Chemical Reaction
• Chemical Bond
• Synthesis Reaction

Multiple Choice

Atoms gain lose, gain, or ______electrons to get a stable outer energy level.

• share

• split

• create

• destroy

Multiple Choice

Elements that do not have full outer energy levels are more stable in __________________.

• bonds

• formulas

• reactions

• compounds

Multiple Choice

Some elements combine chemically and no longer have the same ________________ they did before forming a compound.

• valence electons

• energy

• properties

• group number

Multiple Choice

What type of reactions absorb energy?

• Endothermic

• Exothermic

Multiple Choice

Why is water polar?

• It has ionic bonds

• It is partially charged

• It has a neutral charge

• It has a north and south pole

Multiple Choice

What type of bonds share electrons?

• hydrogen

• covalent

• ionic

Multiple Choice

What type of bonds share electrons?

• hydrogen

• covalent

• ionic