Grade 9 Science EXAM REVIEW – CHEMISTRY
Use your notebook to complete all of the following review questions.
Please note that your completed notebook, corrected tests and units review sheets are the BEST study tools. These questions will only help to reinforce some of the exam topics.
1. Complete the following table using your knowledge of the Particle Theory of Matter:
STATE of MATTER / FORCES OF ATTRACTION / SPACING OF MOLECULES / MOVEMENT OF MOLECULESsolid
liquid
gas
2. Name FIVE ways in which you know a chemical change has probably taken place.
______
______
______
3. Identify each of the following examples as either physical or chemical changes:
a) clothes dried while hanging outdoors ______
b) hamburger is cooked ______
c) wood burning ______
d) frost forming on a car windshield ______
e) a penny tarnishes ______
Subatomic Particle / Location in the Atom / Charge / Relative Massproton
neutron
electron
4. Complete the table:
5. Complete the missing values in the following table:
MASS / VOLUME / DENSITY25.0 g / 40 mL
2.0 mL / 1.5 g/mL
400 g / 15 cm3
40.65 cm3 / 10.2 g/cm3
250 g / 16 g/mL
80.5 g / 25 g/L
6. A 40 g jewel has a density of 2.5 g/mL. Use the GUESS method to calculate the volume of the jewel.
7. For each of the properties listed below: identify if it is a physical or chemical property.
a) lustre
b) malleability
c) ductility
d) combustability
e) reacts with acid
f) conductivity
g) solubility
h) hardness
i) reacts with water
j) state
k) brittleness
8. Identify the following substances as pure substances or mixtures and identify the type of mixture (homogenous vs. heterogeneous) or pure substance (element vs. compound)
Mixture or Pure Substance? Type of Mixture/Pure Substance
i) raisin bran cereal ______
ii) shaving cream ______
iii) pure water ______
iv) nail polish remover ______
v) salt ______
vi) oxygen ______
vii) muddy water ______
9. Complete the following chart on the Classification of Matter.
Matter
Mixtures
Compounds
10. Complete the following sentences which refer to the standard tests for certain gases.
a) When a glowing splint is placed in the presence of a gas, it bursts into flame
(combusts). This would prove that the gas was ______.
b) When a burning splint is places in the presence of a gas, an explosive “popping” noise
is heard. This would prove that the gas was ______.
11. Provide names for the following compounds. a) Na2S b) MgCl2 c) CaO
12. Provide formulas for the following compounds
a) magnesium fluoride b) boron bromide c) aluminum phosphide
13. Complete the following paragraphs on the atom.
Matter is made up of small particles called ______. There are smaller pieces that make up atoms called ______, of which there are three types; ______, ______and ______.
Most of the mass of the atom is located in its core called the ______which contains ______which are neutral (no charge) and ______which are positively charged. ______, which are negatively charged, are thought to move around the core in orbits.
If an atom is electrically neutral, it has equal numbers of ______and
______. Sometimes atoms gain or lose ______. If an atom gains electrons, its net charge will be ______and if it loses electrons, its net charge will be ______.
14. Use the particle theory to explain why wires are hung with slack and spaces are left between sidewalk pieces.
15. Using the Periodic Table of Elements in your notebook, complete the following table:
Element Name / Symbol of Atom / Scientific Notation / Mass Number / Atomic Number / # of electrons / # ofprotons / # of
neutrons
oxygen / 16
32 / 16 / 16
4020Ca / 40 / 20
beryllium /
Be
65 / 30
16. Compare the following terms:
homogeneous (solution) and heterogeneous (mechanical mixture)physical property and chemical property
Physical change and chemical change
metal and non-metal
element and compound
pure substance and mixture
17. Give the location and reactivity of: alkali metals, halogens, alkaline earth metals, noble gases
18. Draw Bohr- Rutherford diagrams for:
a) Sulfur b) Sodium c) Lithium