Test #1: Introducing Linear Systems and Solutions

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KNOWLEDGE
APPLICATION
SNC 2D
September 2014
Name: _______________________
/19
/26
Parent Signature: _______________________
CHEMISTRY QUIZ #1
KNOWLEDGE
Multiple Choice: Circle the best answer.
1. The atomic number of an element tells you:
(a) the number of protons in its nucleus.
(c) the number of neutrons in its nucleus.
(b) the number of protons in its shells.
(d) the number of electrons in its nucleus.
2. The mass number of an atom is the number of:
(a) protons in the nucleus.
(b) neutrons in the nucleus.
(c) protons and neutrons together.
(d) all the particles in the atom.
3. Which of the following is not an example of a chemical property?
a) Nitrogen reacts with oxygen to form laughing gas
b)Hydrogen is less dense than air.
c)Hydrogen is formed when you place potassium in water.
d)Oxygen supports fire.
4. What sub-atomic particle is not present in the nucleus of atoms:
a) Protons
b) Neutron
c) Electrons d) All are present in the nucleus of atoms.
5. Which of the following elements would most likely be a metalloid?
a) sodium
b) oxygen
c) silicon
d) gold
6. Which element is found in the 2nd group and the 3rd period?
a) Calcium
b) magnesium
c) boron
d) coffee
7. When drawing a Bohr diagram, how many electrons can fit on the first electron shell of an atom?
a) 2
b) 4
c) 8
d) 16
8. If a neutral atom has 15 protons and 16 neutrons, its atomic number is:
a) 1
b) 15
c) 16
d) 31
9. If a neutral atom has 15 protons and 16 neutrons, its atomic mass is:
b) 1
b) 15
c) 16
d) 31
10. A family of elements ...
a) is located in a vertical group on the periodic table.
b) is located in a horizontal row on the periodic table.
c) is a group of elements related by size and colour.
d) is another name for a period on the periodic table.
Fill in the blank
What is WHMIS?
W- Workplace
H- Hazardous
M- Material
I- Information
S- System
Grade 10 Science SNC2D
Unit Chemistry
Symbol
Description
Symbol
Description
Compressed Gas
Flammable
Oxidizing Agent
Poisonous
APPLICATION
1. Identify each of the following as either a physical (P) or a chemical change (C). Explain [4 marks]
Physical or Chemical Reason
A change to the bread that can’t be reversed
toast browning
Chemical
Element is heated but can cool down and still
hot coil on your stove glowing red Physical
clothes drying
Physical
milk going sour
Chemical
be the same element
Water is just being vaporized, the clothes are
still clothes
The milk has changed composition to sour
milk
2. Use the periodic table to complete the table below. (Round the atomic mass to the nearest whole number to
obtain the mass number and assume that all the elements are neutral) [8 marks]
Element Name
Element
Atomic
Number of
Number of
Number of
Symbol
Number
Protons
Neutrons
electrons
Magnesium
Mg
12
12
12
12
Aluminum
Phosphorous
Tin
Al
13
13
14
13
P
15
15
16
15
Sn
50
50
69
50
3. Do all atoms of the same element contain the same number of protons and neutrons? Explain. [2 marks]
No, isotopes are atoms of the same element, just with different numbers of neutrons
4. In a reaction Mg would likely lose 2 electrons to have a stable outer electron structure. So Mg tends to form
a Mg2+ ion. What ions would the following elements likely make? [4 marks]
K __+____
Al __3+____
P ___3-____
F __F-_____
5. Draw a Bohr-Rutherford diagram for each of the following elements: [8 marks]
a) Nitrogen
b) Chlorine
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