SNC2P1
Name: ________________________________________
CHEMISTRY TEST #1 REVIEW
PART A – Match the following terms to their definition.
1. Physical Change
4
2 or more elements bonded together
2. Chemical Change
5
an atom that has lost electrons
3. Element
8
a compound with a metal and a nonmetal
4. Compound
7
the last electron shell of an atom
5. Positive ion
3
cannot be broken down any further
6. Negative ion
13
valence electrons
7. Valence shell
10
Group 17
8. Ionic compound
1
no new substances are produced
9. Molecular compound
9
a compound with 2 nonmetals
10. Halogens
2
new substances with different properties
11. Noble gases
are produced
12. Alkali metals
12
Group 1
13. elements in the same group
6
an atom that has gained electrons
have the same number of ?
11
Group 18
PART B – Ionic or Molecular?
Identify the types of atoms in each compound as either metal or non-metal. Then
decide if the compound is ionic or molecular.
Chemical Formula
Metal + Non-metal
Ionic or Molecular Compound?
or 2 Non-metals?
SrCl2
Metal + non-metal
Ionic compound
P2O5
2 non-metals
Molecular compound
SCl2
2 non-metals
Molecular compound
CBr4
2 non-metals
Molecular compound
Rb2S
Metal + non-metal
Ionic compound
PART C – Use the WORD BANK below to fill in the blanks.
1. A subscript tells you how many atoms of the element are in the compound.
2. Metals are on the left side of the staircase on the periodic table.
3. The protons and neutrons are in the nucleus.
4. The electrons are surrounding the nucleus in shells or orbits.
5. Metals will lose electrons to become stable and nonmetals will gain electrons to
become stable.
6. Nonmetals will have a negative charge when they become ions and metals will
have a positive charge.
7. To become stable, all atoms want a full outer shell.
8. A group of element symbols and subscripts that represent the MAKEUP of a
chemical compound is called a chemical formula.
chemical formula
negative
gain
Word Bank
full
left
lose
positive
subscript
nucleus
electrons
neutrons
right
PART D – Circle the best answer for each.
1.
Which of the following is an element?
a) water
b) salt
c) mercury
d) pizza
2.
Which is a chemical change?
a) Ripping a piece of paper in two.
b) Baking chocolate cupcakes.
c) Dissolving sugar into coffee.
d) A popsicle melting on a hot day.
3.
Which of the following is a compound?
a) aluminum
b) carbon dioxide
c) copper
d) Kool-Aid in water
4.
Which element has 34 electrons, 34 protons and 45 neutrons?
a) rhodium
b) bromine
c) sodium
d) selenium
5.
How many valence electrons does nitrogen have?
a) 2
b) 3
c) 4
d) 5
6.
Which ion will calcium form to become stable?
a) +2
b) +4
c) -2
d) -4
7.
Which family does Chlorine belong to?
a) alkali metal
b) alkaline earth metal
c) halogen
d) noble gas
8.
How many protons, neutrons and electrons does carbon have?
a) 6, 7, 6
b) 8, 7, 8
c) 8, 6, 8
d) 6, 6, 6
PART E- Indicate if the following compounds are Ionic or Molecular, by putting a
checkmark in the correct column.
Compound
sodium chloride
carbon tetrachloride
silver nitride
magnesium oxide
nitrogen monoxide
Ionic

Molecular




PART F – Naming Compounds (Only molecular compounds have the prefixes mono,
di, tri, etc.)
1. Mg3N2 magnesium nitride
5. CO carbon monoxide
2. LiCl lithium chloride
6. N2O2 dinitrogen dioxide
3. BaO barium oxide
7. CCl4 carbon tetrachloride
4. Al2S3 aluminum sulfide
8. NH3 nitrogen trihydride
PART G – Write the formula for the following compounds.
-crossover the charges (not the sign) and reduce the numbers for ionic
compounds
-write the number that matches the prefix for molecular compounds.
1. lithium oxide Li2O
5. sodium chloride NaCl
2. carbon dioxide CO2
6. carbon tetrafluoride CCl4
3. potassium bromide KBr
7. diphosphorus trisulfide P2S3
4. silicon tetraiodide SiI4
8. barium iodide BaI2
PART H – More Formula Writing
Identify the following compounds as ionic or molecular. Then write their formula.
Compound Name
Ionic or Molecular
Compound Formula
carbon monoxide
Molecular
CO
zinc oxide
Ionic
ZnO
potassium fluoride
Ionic
KF
dinitrogen pentoxide
Molecular
N2O5
aluminum sulfide
Ionic
Al2S3
phosphorus trichloride
Molecular
PCl3
disulfur dinitride
Molecular
S2N2
magnesium phosphide
Ionic
Mg3P2
lithium iodide
Ionic
LiI
diphosphorus hexoxide Molecular
P2O6
PART I – Reading Chemical Formulas
Name of Compound
sodium fluoride
Chemical
Formula
NaF
calcium nitride
Ca3N2
diphosphorus trioxide
P2O3
boron triiodide
BI3
beryllium chloride
BeCl2
Number of Atoms of Each Element
1 atom of sodium
1 atom of fluorine
3 atoms of calcium
2 atoms of nitrogen
2 atoms of phosphorus
3 atoms of oxygen
1 atom of boron
3 atoms of iodine
1 atom of beryllium
2 atoms of chlorine