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Are you ready for chemistry?
Some terms:
Chemistry The study of matter, its composition and its
interactions Matter
Anything that has mass and occupies space
Property A characteristic
Physical Change
A change in which the substance changes form, but not compostion
Chemical change
A change in which the substance changes composition and makes something new.
http://www.saskschools.ca/curr_content/science
9/chemistry/lesson8c.html
Qualitative vs Quantitative
An observation that does not contain a number.
Example: It is warm outside.
An observation that does contain a number.
Example: The temperature outside is 25C.
Mixture
A combination of two or more kinds of matter, in which each component retains its own characteristics.
Solution vs Heterogeneous mixture
A mixture in which the different components are mixed so that they appear to be a single substance
A mixture in which the different components can be distinctly seen.
Pure substance
A material that is composed of only one type of particle. (Can be an element or a compound.)
Element vs compound
A pure substance that cannot be broken down into smaller particles and retain the same properties.
A pure substance that is composed of two or more elements chemically bonded in fixed proportions.
Atomic number vs Mass number
The number of protons in an atom
A sum of the protons and neutrons in one atom of a particular element.
Isotope
Atoms of an element that have the same number of protons but different numbers of neutrons, giving them a different mass number.
Radioisotope
An unstable isotope of an element, which undergoes radioactive decay.
Plutonium pellet
Gas Tests
Type of Splint Used
Result
Oxygen glowing Relights
Hydrogen Flaming Pops
Carbon Dioxide
Glowing Extinguishes
5 Clues that a chemical reaction has taken place:
1. A colour change is observed. 2. The change is difficult to reverse. 3. Bubbles of gas are produced. 4. Heat or light is released or absorbed. 5. A precipitate forms when two
solutions are mixed.
Physical or Chemical Change? A. Rusting of metal?
Chemical B. Dissolving of sugar?
physical C. Water freezing?
physical D. Burning Leaves?
chemical E. Dynamite exploding?
chemical F. Shattering Glass?
Physical
Qualitative or Quantitative
A. The flame from the burning carbon was 4 cm high. Quantitative
B. Coal is the primary source of carbon. Qualitative
C. The apple has a mass of 200g. Quantitative
D. Mercury is a silver liquid at room temperature. Qualitative
Name Symbol Name Symbol
Hydrogen H Carbon C
Oxygen O Sodium Na
Aluminum Al Chlorine Cl
Calcium Ca Iodine I
Lithium Li Gold Au
Potassium K Lead Pb
Calcium:
A. In what period is it located? 4
B. In what group is it located? 2
C. What is its atomic number? 20
D. What is its atomic mass? 40 amu
Two main types of bonds
Ionic Bonding Electrons are
transferred from a metal to a non-metal
Covalent bonding Electrons are shared
between two non-metals
Binary Compounds A. MgO
Magnesium oxide B. Li3P
Lithium phosphide C. CaBr2
Calcium bromide D. BaCl2
Barium chloride E. K2S
Potassium sulphide F. AlN
Aluminum nitride
Write the word equation for each of the following:
A. Magnesium reacts with oxygen to produce magnesium oxide. Magnesium + oxygen Magnesium oxide
B. Copper (II) sulphate reacts with lithium nitrate to produce lithium sulphate and copper (II) nitrate. Copper (II) sulphate + lithium nitrate lithium
sulphate + copper (II) nitrate
5 types of chemical reactions.
1. Synthesis Two or more substances become one A + B AB
2. Decompostion One substance breaks down into two or more
products AB A + B
3. Single Displacement One element replaces another in a compound A + BC AC + B or AB + C CB + A
5 types of chemical reactions
4. Double Displacement Two compounds switch ions. AB +CD CB + AD
5. Combustion A reaction with oxygen that produces carbon
dioxide and water Hydrocarbon + O2 H2O + CO2
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