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Chemistry Topics 1-3

Chemistry quiz 1

Flammable and combustible material will easily light on fire
Poisonous and infectious- immediate and serious material that is immediately toxic and potentially deadly
Compressed gas Contents under pressure
oxidizing material material that creates a lot of oxygen, or easily reacts with oxygen to fuel fires
Poisonous and infectious- other toxic effects material that is toxic over a long period of time, or after a larger dose
biohazardous infectious living material that is toxic or dangerous to humans. ex virus or bacteria
corrosive material burns or eats away metals, glass, or flesh
dangerously reactive go through extreme reactions of fire, explosions, or intense heating
exclamation mark (aka harmful) new WHMIS symbol. Very toxic to human health after one exposure
health hazard new WHMIS symbol. Toxic to human health after a long exposure or large dose
exploding bomb new WHMIS symbol. Very reactive and will blow up easily
Environmental hazard causes damage to aquatic environments
sublimation change of state of matter from solid to gas
condensation change of state of matter from gas to liquid
evaporation change of state of matter from liquid to gas
caustic corrosive- but will eat organic tissue
matter takes up space and has mass
pure substance one type of particle or molecule
mixture 2 or more types of molecules. Not bonded
Elements 1 type of atom
compounds 2 or more atoms chemically bonded
homogeneous mixture mixture that looks like all one substance
heterogeneous mixture mixture that looks like different substances
solution smaller molecule mixture that looks like all one substance
colloid larger molecule mixture that looks like all one substance
mechanical mixture large piece mixture that looks different
suspension a mixture that settles into layers and the different parts can be seen
tyndall effect (light test) light passes through a solution but not a colloid
particle model of matter -all matter is made of tiny particles -They have space between them -all pure substance particles of one element are identical - particles are always moving - particles are attracted to each other
physical change change in form. Substance stays the same
chemical change Creation of a new substance
indicators of a chemical change - unexpected change in colour - change in temperature - new substance is made - change in taste/ smell - gas production
chemical properties properties of a substance that need to be tested with reactions to appear
physical properties properties of a substance that you can see or measure
three subatomic particles proton, neutron, electron (subatomic means smaller than an electron)
proton positive subatomic particle
neutron neutral subatomic particle
electron negative subatomic particle
nucleus where most of the mass of the atom comes from (protons and neutrons)
1st shell of the electron shell holds 2 e-
2nd and 3rd electron shells hold 8 e- each
atom smallest whole unit of matter. Make up elements
laws summarize scientific principles- doesn't explain why it happens
theories explains scientific facts.
law of definite composition compounds are put together in set ratios
law of conservation of mass matter cannot be created or destroyed only changed in form
John Dalton Thought atoms were like billiard (pool) balls
JJ Thompson plum pudding model- electrons stuck in a cookie dough looking substance
Ernest Rutherford Planetary model- said most of the mass came from the nucleus and the rest was mostly empty space
Niels Bohr Atomic model- said electrons move around the nucleus in fixed pathways
Current electron model electron cloud model- said there is a region around the nucleus where electrons are found
Created by: carly.riddle
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