• Submitted By: emeke
  • Date Submitted: 02/03/2014 8:14 PM
  • Category: Science
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Science 10 Review
Bolded numbers are textbook reference pages.

• WHMIS – Workplace Hazardous Materials Information System; symbols used to identify dangerous materials (xiii, 8)

• Classifying Matter – matter is anything with mass and volume and could be either solid liquid or gas. Matter can be further divided into either a mixture or a pure substance. See page 10.

• Atomic Theories –Early Chemists devised theories about the structure of an “atom”.
o Dalton’s Atomic Theory (12):
 All matter is made up of small particles called atoms
 Atoms cannot be created, destroyed or divided into smaller parts
 All atoms of the same element have the same mass but different elements have different masses
 Put two elements together and you get a compound
 Chemical reactions change the way atoms are grouped but atoms themselves do not change
 Looks like a billiard ball (solid, uniform, sphere)
o J.J. Thomson (15):
 Thought atoms might be made up of smaller particles
 Proved that negatively charged electrons were part of an atom
 Viewed atom as a “raisin bun”
o Rutherford (16):
 Using alpha particle streams showed that positively charged protons and neutral neutrons existed within an atom’s nucleus.
 A volume of empty space surrounded the nucleus
 Atomic model looks like a “solar system”
o Bohr (19):
 Thought electrons were associated with certain energy levels
Energy level Maximum # of electrons
1 2
2 8
3 8
• What element is the drawing of? ______Al

o Working Model of the Atom (22):
particle Charge Symbol
Proton 1 + p+
Neutron 0 n0
electron 1 - e-

• Nuclear Notation (22) using the periodic table -
o Atomic Number = number of protons
o Mass Number = number of protons + number of neutrons
o Number of neutrons = mass # - atomic #
 How many neutrons in magnesium? ______12

• Periodic Table (25):
o Organizes elements to help us predict their properties
o Three major sections:

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