all questions for science 10 exam .
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| what does whmis stand for | workplace , hazardous, materials, information, system
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| three elements of whmis system | labels, msds, education
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| effects of compressed gas | heating or dropping the container may cause it to explode
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| effects of oxidizing material | may cause fire or explosion if near flammable or combustible materials
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| effects of flammable and combustible material | may cause fire or explode if exposed to heat, sparks, flame or friction
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| effects of corrosive material | may cause severe skin and eye irritation, may be harmful if inhaled
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| effects of immediate and serious toxic effects | may be fatal if swallowed , inhaled, or absorbed through the skin
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| effects of other toxic effects | may cause cancer , birth defects , sterility or allergic reaction
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| effects of bio hazardous infectious materials | serious diseases that result in death or illness
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| effects of dangerously reactive material | release a toxic or flammable gas
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| historical example of how humans worked with chemical substances to meet their basic needs | the aboriginals have used chemicals to make clothes, food, treat illness, and build tools.
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| what is matter | anything with mass and volume, solid liquid or gas
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| what is a mixture | combinations of matter that can be separated by physical means
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| what is a pure substance | matter that has a definite composition
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| what is a element | cannot be chemically broken down into simpler substance
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| what is a compound | two or more elements that are chemically combined
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| what is a heterogeneous mixture | different components of the mixture are visible like a salad, all the different veggies.
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| what is a homogeneous mixture | different components are not visible like coffee
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| what was daltons atomic theory | all matter is made up of small particals called atoms
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| what was jj thomsons theory | stable, negatively charged particles which are now known as particles
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| jj thomsons model nicknames | plum pudding or raisin bun
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| what was rutherfords atomic model | nucleus, electrons, empty space, neutrons and isotopes
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| what was niel bohrs theory | energy levels
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| maximum # of electrons in each energy level | 2,8,8
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| proton symbol | p+
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| neutron symbol | n^0
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| electron symbol | e-
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| greek word for atom means | uncuttable
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| number of neutrons = | mass# - atomic#
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| atomic # is the same as | protons and electrons
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| location in periodic table, metals | left of staircase
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| location in periodic table, non- metals | right of staircase
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| location in periodic table, metalloids | the staircase
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| direction of groups on periodic table | vertical columns |
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| direction of periods on periodic table | horizontal columns _
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| chemical families in order | alkali, alkaline , halo , noble
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| where are the chemical families located | first group, second group, 17th group, 18th group.
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| the periodic table represents patterns related to | arrangement of electrons in atoms
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| what is a stable octet | when the last layer in the energy level is full.
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| the period # of an element is: | number of occupied energy levels of its atoms
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| define valence energy | its the outermost occupied energy level of an atom
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| define valence electrons | the electrons in the valence energy level
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| anion sign | -
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| cation sign | +
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| prefixes for molecular compounds | mono, di, tri, tetra, penta, hexa, hepta, octa, nona, deca,
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| acetic acid conductivity and effect on litmus | high, blue to red
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| sugar conductivity and effect on litmus | none, no change
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| pottasium chloride conductivity and effect on litmus | high , no change
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| barium hydroxide conductivity and effect on litmus | high, red to blue
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| substance that conducts electricity in a solution | electrolyte
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| substance that does not conduct electricity in solution | non electrolyte
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