Chem 10 Flashcards
WHMIS
Workplace Hazardous Materials Information System
SDS (MSDS)
Safety Data Sheets (Materials Safety Data Sheets)
Physical Properties
describe the appearance and physical composition of a substance
Chemical Properties
Describe the reactivity of one substance with another
Types of physical properties
-Boiling/melting point
-malleability
-ductility
-colour
-state
-solubility
-crystal formation
-conductivity
-magnetism
Types of chemical properties
-Ability to burn
-flash point
-behaviour in air
-reaction with water
-reaction with acid
-reaction to red and blue litmus
Matter
Has mass and takes up space
Mixture
Physical combination of 2 or more substances, each of which keeps it’s own chemical properties
Homogenous
Same appearance throughout- single phase(solid, liquid, gas)- suspension, colloid
Heterogeneous / mechanical mixture
Components can be distinguished, not uniform in appearance, possibly more than one phase (solid, liquid, gas)
Solution
Composed of a solute and solvent
Colloid
Particles do not settle out through time. Cannot see particles with eye. Very thick, sticky.
Suspension
Particles in liquid settle out due to gravity. Can see particles with eye
Element
Cannot be further decomposed. Represented on the periodic table table by an atomic symbol.
Compound
Chemical combination of 2 or more elements. Can be decomposed by a chemical reaction.
Salting
Placing meat in salt to preserve it and draw out water and bacteria.
Smoking
Creates an antioxidant to preserve the food.
Heating
Sterilizes food to make it safe to eat.
Canning
Preserves food without oxygen, kills off microbes
Fermentation
Biochemical preservation to preserve and create lactic acid to prevent growth of bacteria
Freezing
Prevents the growth of bad bacteria, meaning the food will keep for a very long time
Aristotle
Believed all matter was made up of air, earth, fire, or water
Democritus
Believed all matter was made up of “atomos” (atomos means indivisible)
John Dalton
All matter is made up of atoms, atoms of the same element are identical, atoms of different element have different properties, elements can combine into a specific ratio. Billiard Ball Model.
J.J. Thomson
“Plum pudding model” , atom was a sphere of positive charge embedded with negative particles.
Nagoaka
Electron found outside the sphere like saturn’s rings.
Ernest Rutherford
Atom has tiny positively charged nucleus
Neils Bohr
Electron travel around the nucleus in discrete models
Metals
Silver grey and/ or shiny
Solid at room temp (except mercury, which is a liquid)
React strongly with other substances