Chemistry 11
Unit 1: Safety, Atomic Theory & Matter Review
1. What is WHMIS?
2. What is a MSDS? Give three pieces of information that could be found on an MSDS.
3. State what each of the following contributed to the knowledge of the atom:
a) John Dalton
b) JJ Thompson
c) Ernest Rutherford
d) Neils Bohr
4.
Complete the following table (the first one is done for you):
Isotope
symbol
Atomic #
Mass #
protons
neutrons
electrons
charge
chlorine – 37 atom
37
17 Cl
17
37
17
20
17
0
silicon-28 atom
0
nitrogen-14 ion
39
aluminum-27 ion
10
27 3+
13 Al
16
33
oxygen-18 atom
28
8
18 2O
8
0
9
0
18
oxygen-16 ion
10
26
Feb 2012
1-
41
18
56
24
2+
Chemistry 11
5. Determine the atomic mass of the following elements:
Isotope
Boron-10
Boron-11
Abundance in
nature (%)
19.6
80.4
Relative mass of
atom (based on 12C)
10.0129
11.0093
Carbon-12
Carbon-13
98.89
1.11
12.0000
13.0034
Oxygen-16
Oxygen-17
Oxygen-18
99.76
0.04
0.20
15.9949
16.9991
17.9992
Calculation
Atomic
Mass
6. Distinguish between the terms atomic mass and mass number.
7. Explain how the isotopes carbon-12 and carbon-13 are similar and how they are different, based on
atomic structure.
8. Indicate how many electrons are in each energy level (Bohr Diagrams) for each of the following atoms
or ions:
Ca
N3-
Ca2+
Ne
9. Using the Electron Energy Chart, determine the electron configuration (spdf) for the following atoms.
a) S
b) Rb
c) Ne
d) Br
10. Periodic Table Trends
a) Which diagram represents: Ionization Energy and Atomic Radius (An arrow shows direction of
increase)
________________
Feb 2012
_______________
Chemistry 11
b) Explain why the atomic radius trend is seen above. Explain the differences we see as we go along
the period and down a group.
c) Using the Diagram below, indicate with arrow heads the direction of the trend described:
Electronegativity Increases
Electronegativity
Increases
d) What is the relationship between an atom’s Electronegativity (EN) and their Ionization Energy (IE)?
11. Identify important properties for each of the following families:
Alkali Metals: a) ___________________
b) ______________________ c) __________________
Alkaline Earth Metals: a) __________________ b) __________________
c) ________________
Halogens: a) ___________________ b) __________________ c) _____________________
12. What type of bond would you expect from the following (ionic or covalent):
a) H and O ___________
d) Ca and Br ____________
b) K and I ___________
e) N and F _____________
c) Ni and Cl __________
f) I and I ____________
13. Distinguish between the terms solvent and solute:
14. Classify each of the following as either: heterogenous mixture, solution, element, compound, molecule,
or ion.
NaCl
_________
Feb 2012
Na
________
N2
_________
concrete
Mg+2
sea water
_________
__________
_________
Chemistry 11
15. Draw a Lewis structure (electron dot diagram) for each of the following:
a) NF3
b) NH4+
c) NO3-
d) CO2
e) N2
f) PO43-
g) CO32-
h) SCN-
i) C2O42- (the shape is shown below)
O
O
C
O
16. a) Give an example of a chemical and a physical property.
b) What is a chemical change? What is a physical change?
17. Give an example of a qualitative and a quantitative observation.
Feb 2012
C
O