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WorksheetsChemical Bonding and Reactions
Total questions: 49
Worksheet time: 33mins
1. What is a chemical bond?
a momentary attraction between atoms, ions or molecules that drives chemical changes
a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds
an unstable attraction between atoms, ions, or molecules that
causes the breakdown of chemical compounds
a weak attraction between atoms, ions, or molecules that facilitates the creation of new matter
How do valence electrons affect atoms?
Valence electrons determine how an atom will bond with another atom or if it will fail to react chemically.
Valence electrons have a significant effect on the atomic mass of atoms.
Valence electrons have no effect on the atom.
The ability of an atom to form a chemical bond with another atom is inversely proportional to the number of valence electrons the atom has.
When is an atom considered to be stable?
when it has equal numbers of protons, neutrons, and electrons
when it has 4 valence electrons
when it is a cation
when its outermost energy level is full
Which elements on the periodic table have stable atoms?
Group 1 (alkali metals)
Group 2 (alkaline earth metals)
Group 17 (halogens)
Group 18 (noble gases)
In an ionic bond, electrons are:
(a)
In a covalent bond, electrons are:
(a)
A cation:
has a positive charge
has a negative charge
has transferred its electrons to another atom
has gained electrons from another atom
An anion:
has a positive charge
has a negative charge
has transferred its electrons to another atom
has gained electrons from another atom
1. A structure that results when atoms are joined together by covalent bonds is called a (a) .
How will sodium and chlorine react chemically?
Sodium will share electrons with chlorine, creating a covalent bond.
Chlorine will transfer its electrons to sodium, making both elements chemically stable.
Sodium will transfer its one valence electro to chlorine to form a compound.
They won't react. Chlorine is a halogen.
Which of these shows the correct electron dot diagram for aluminum?
Which of these shows the correct electron dot diagram for the combination of nitrogen and hydrogen?
Name the following compound:
SrF2
(a)
Name the following compound:
SiO2
(a)
Name the following compound:
KI
(a)
Name the following compound:
Cl2O
(a)
Which of these is the correct formula for dihydrogen monoxide?
H4O
H2O
H2O2
H3O2
Which of these is the correct formula for sulfur dichloride?
SOCl
S4Cl2
SCl4
SCl2
Which of these is the correct formula for barium oxide?
BO
B4O
BaO
Ba2O
Which of these is the correct formula for phosphorus tetrachloride?
KCl4
P4Cl
PCl4
KCl4
Which of these is the correct formula for aluminum oxide?
AlO
Al2O
AlOH
Al2O3
Ionic bonds form between metals and (a) .
Fill in the blanks to correctly balance the equation:
__H2 + __O2 → __H2O
2, 2, 2
1, 2, 1
4, 2, 3
2, 1, 2
Fill in the blanks to correctly balance the equation:
__Zn + __H3PO4 → __Zn3(PO4)2 + __H2
3, 2, 1, 3
6, 1, 2, 1
3, 2, 1, 2
1, 2, 1, 3
Fill in the blanks to correctly balance the equation:
__KClO3 → __KCl + __O2
1, 2, 3
2, 2, 3
3, 2, 3
2, 3, 3
Where are reactants located in a chemical equation?
on the right side of the yield arrow
on the left side of the yield arrow
What does the Law of Conservation of Mass state?
Matter cannot be created or destroyed.
In a closed system, the mass and substance of an element or compound will not change.
In a chemical reaction, the total mass of the reactants is equal to the total mass of the products.
Chemical bonds are created through the rearrangement of atomic mass while conserving atomic energy.
Identify the type of chemical reaction:
Cl2 + 2KBr → 2KCl + Br2
single replacement
double replacement
synthesis
decomposition
combustion
Identify the type of chemical reaction:
2NaOH + CuSO4 → Na2SO4 + Cu(OH)2
single replacement
double replacement
synthesis
decomposition
combustion
Identify the type of chemical reaction:
Al2S3 → 2Al + 3S
single replacement
double replacement
synthesis
decomposition
combustion
Identify the type of chemical reaction:
Zn + S → ZnS
single replacement
double replacement
synthesis
decomposition
combustion
Identify the type of chemical reaction:
C4H12 + 7O2 → 6H2O + 4CO2
single replacement
double replacement
synthesis
decomposition
combustion
In an endothermic reaction, energy is (a) .
In an exothermic reaction, energy is (a) .
Which of these speeds up a chemical reaction?
reactant
inhibitor
equilibrium
catalyst
Which of these slows down a chemical reaction?
reactant
inhibitor
equilibrium
catalyst
Which of these are disadvantages to using nuclear fission for energy?
high cost
radioactive waste is difficult to dispose of
risk of a nuclear disaster
potential terrorist target
environmental effects to air and water
What are some advantages for using nuclear fission for energy?
low energy costs
no greenhouse emissions
renewable fuels
abundant energy production
_________ particles have the greatest intensity. They can be stopped by concrete.
alpha
beta
gamma
_________ particles have the lowest intensity. They can be stopped by paper.
alpha
beta
gamma
_________ particles are medium intensity radioactive particles that can be stopped by aluminum.
alpha
beta
gamma
How is nuclear waste disposed of?
It is burned.
It is placed in underground concrete bunkers.
It is wrapped in plastic and sunk into the deepest parts of the ocean.
It is used to make nuclear bombs.
What 2 subatomic particles are involved in nuclear fission?
proton
neutron
electron
quark
Which type of reaction occurs when a larger nucleus splits into smaller nuclei?
Fusion
Fission
Which type of reaction occurs when smaller nuclei combine to form a larger nucleus?
Fusion
Fission
Balance the nuclear equation
an alpha particle will be emitted
a beta particle will be emitted
a gamma particle will be emitted
What is the time that it takes for ½ of a radioactive substance to decay?
(a)
The half-life of radon-222 is 3.8 days. What fraction of radon-222 remains after 2 half-lives?
(a)
What is the half-life of Tc-99 if a 500 g sample decays to 62.5 g in 639,000 years?
(a)
