SNC1P
CHEMISTRY: ATOMIC STRUCTURE
QUIZ#3
PART A: MULTIPLE CHOICE (10 MARKS)
Choose the best response in each case and place your answer in the appropriate space on your answer sheet.
1.
Atoms of elem ents:
6.
How many neutrons are in an atom of fluorine
?
(a) are neutral overall
(b) have an overall positive charge
(a) 9
(c) have an overall negative charge
(b) 10
(c) 19
2.
The atomic number of an element tells you:
7.
(a) the number of electrons in its nucleus
If a neutral atom of an element has 14 electrons and
(b) the number of protons in its nucleus
19 neutrons, its mass number is:
(c) the number of neutrons in its nucleus
(a) 14
(b) 19
3.
(c) 33
The mass number of an atom is the number of:
(a) protons in the nucleus
8.
(b) neutrons in the nucleus
4.
How many subatomic particles are there in a “normal”
(c) protons and neutrons together
sodium atom
Atoms of different elements must have:
(a) 11
(a) different numbers of protons in their nuclei
(b) 23
(b) different mass numbers
(c) 34
?
(c) the same number of neutrons & electrons
9.
5.
Which line gives the correct number of electrons,
protons, and neutrons in an atom of aluminum
?
If potassium (K) has a combining capacity of 1 (ie 1
hole) and oxygen has a combining capacity of 2 (ie 2
holes), what is the formula for potassium oxide?
(a) K 2O
(a) 13, 14, 13
(b) KO 2
(b) 13, 13, 14
(c) KO
(c) 14, 13, 13
10. The chemical formula for carbon dioxide is CO 2. In
one molecule of carbon dioxide there is
(a) 2 carbon and 1 oxygen
(b) 1 carbon and 2 oxygen
(c) neither (a) nor (b)
PART B: MATCH (5 MARKS)
Match the definition from the 1 st column to the best term in the 2 nd column and place the matching letter in the
appropriate space on your answer sheet.
1.
Abbreviation for the name of an element.
A) atomic mass
2.
Process that uses electricity to break water down into hydrogen and oxygen.
B) atomic number
3.
Atom that has become charged by gaining or losing electrons.
C) chemical formula
4.
Drawing used to help understand how a molecule forms.
D) chemical symbol
5.
Number of protons in an atom.
E) combining capacity
F)
electrolysis
G) energy level
H) ion
I)
precipitate
J)
structural diagram
SNC1P
CHEMISTRY: ATOMIC STRUCTURE
PART A: MULTIPLE CHOICE (10 MARKS)
1
2
3
4
5
6
7
QUIZ#3
PART B: MATCH (5 MARKS)
8
9
10
1
2
3
4
5
PART C: SHORT ANSWER (60 MARKS)
Answer the following questions in the space provided. If more space is needed, use the back of this sheet.
{4} 1.
Describe the chemical tests (and the results) that can be used to identify the following (see example).
GAS
TEST
water vapour
RESULTS
cobalt chloride test paper
changes from blue to pink
oxygen gas
hydrogen gas
{9} 2.
Com plete
the
Relative Mass
Charge
Location
following chart that
compares
the
Electron
subatomic particles.
Proton
Neutron
{6} 3.
Indicate the element and the # of atoms
{6} 4.
of that element present in the following
Use the diagrams below to draw B-R diagram s for the
following elem ents:
molecule.
Na2CO3
(a)
#
(b)
Na C
-
O
-
{15} 5.
Complete the chart below using the information given.
Element
argon
Symbol Atomic # Mass #
18
# p’s
# e’s
# n’s
{6} 6.
Express the first 3 atoms from question #5 in
standard atomic notation. (
40
argon
sodium
23
oxygen
???????
11
8
50
format)
8
10
sodium
oxygen
{4} 7.
Use the following info to help
draw structural diagrams for:
{10} 8.
ATOM
# OF CONNECTIONS
hydrogen
1
oxygen
2
nitrogen
3
carbon
4
(a)
O2
(b)
NH3
NOTE! This quiz has been redone. As a result, the original question 8 removed and replaced with the following
question - see (a) below. However, the answers that go with this quiz will still show the original question 8 - just
disregard that answer (you are not responsible for this material). The answer to this question is in the last-day
notes!
(a) Some elements and compounds, while extrem ely useful, can also be extrem ely dangerous. Describe three of these
hidden hazards. Use the space below to record your answers. Be sure to use full sentences and to include a lead-in
sentence.