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science10exam
all questions for science 10 exam .
| Question | Answer |
|---|---|
| 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
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