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all questions for science 10 exam .

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