-is anything with mass and takes up space;
-is the building block of atoms;
-have properties like texture, shape, colour, etc.
Particle Theory of Matter:
-all matter is made of particles;
-particles of a pure substance stay the same; different substances have different particles;
-particles are always moving. The more energy from heat, the faster they move;
-there are attractive forces between the particles.
Hardness: resistance of being scratched
Malleability: can be bent into shapes
Ductility: pulled into wires like copper
Melting and Boiling Points: points of boiling/melting of a substance
Solubility: dissolving in a solvent
Viscocity: thickness of substance and resistance against flow
Density: V/M (how close the particles are; how dense)
Chemical properties: Ability of reacting to substances and changing to a new one.
Combustability: combusting into flames usually from reaction of oxygen (oxidizing)
Reacting with acid: behavior when in contact of an acid
6 Clues for a chemical change
1. It's irreversible
2. Heat has been produced
3. Colour changed
4. Odour produced
5. Bubbles produced
6. Solid forming in a liquid
At least 2 of these must occur to say that the substance has chemically changed.
eg. 15mm3=0.000 000 000 000 015 hm3 because from mm to h, that's 5 spaces left and then you multiply the number of spaces and the exponent (3)
Also, 1mL=1cm3
WHMIS: Workplace items.
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