Science 9 Chemistry Review
Unit 2: Chemistry:

Chemical properties vs physical properties (p.104, Table 2.2)

Physical change
o Change of state (melting, freezing, evaporation, etc)
o Dissolving

Chemical change (7 types of evidence)
1)
4)
2)
5)
3)
6)

Classification of matter

Metals vs nonmetals
7)

Combustion reaction
o ____ + oxygen - ____ + energy

Corrosion reaction
o Metal + oxygen  _____
o
Galvanization
o
How do you slow it down
o
What is similar between a corrosion reaction and a combustion reaction

Endothermic vs exothermic reaction

Conditions that affect the rate of a reaction
o
o
o
o
o
Law of conservation of Mass
o Definition


Model of the atom
o Label protons, neutrons, electrons, nucleus, and the respective charges.

Be able to apply molecular models to chemical formulas.
o Draw a model of C2H5

Understand and be able to apply the relationship between atomic number, atomic mass,
and number of protons, electrons, and neutrons.
o How many protons, neutrons, and electrons are in Chlorine? Hydrogen?

Be able to identify the elements, and number of atoms in a compound by looking at its
chemical formula.
o How many elements and atoms are in CH3COOH? NH4?

Know how to name ionic and molecular compounds.
o Ionic (metal + non metal)
 No prefix (just name)
o Molecular (nonmetal + nonmetal)
 Prefix (mono, di, tri, tetra, penta)
o
Name:




Al2O3
N2O3
CaCl2
CCl4

Know how to write the ionic and molecular formulas
o Ionic – charge, drop and swap
o Molecular – use the prefix
o
Write the formulas for the following:
 Lithium oxide
 Tetracarbon monoxide
 Iron (III) oxide
 Sulfur trioxide

Understand what a word equation is and how to turn into an equation with formulas.
o Write the equation for: potassium chloride and lithium oxide are produced from
the reaction of potassium oxide and lithium chloride.

Be able to identify the reactants and products of a chemical reaction.
o NaCl + MgBr  MgCl + NaBr
 Which compounds are the reactants? Products?

Understand and be able to identify/apply the trends within the periodic table
o Rows are called ____________ (arranged in increasing _______________)
o Columns are called _____________ (share similar ______________)
 Most reactive vs least reactive

WHMIS symbols
o Label