1. CHEMISTRY BASICS Day 3 Lecture

2. Chemistry Study of the: –C omposition –Structure, and –Properties of Matter –and the changes it undergoes.

3. Matter Anything that takes up space and has mass

4. Mass vs. Weight Mass – measure of the amount of matter in a substance. Weight – the amount of gravitational pull on an object –They are related, but not the same thing In Space: –No gravity, so have mass but no weight

5. Volume Measure of the amount of space a substance takes up

6. Building Blocks of Matter 1.Atoms: smallest unit of an element that still has the properties of that element 2.Elements: pure substances made up of only one kind of atom 3.Compounds: a substance made up of more than one kind of element

7. Demo

8. Intensive Color Odor Luster - How shiny a substance is. Malleability - The ability of a substance to be beaten into thin sheets. Ductility - The ability of a substance to be drawn into thin wires. Conductivity - The ability of a substance to allow the flow of energy or electricity. Hardness - How easily a substance can be scratched. Melting/Freezing Point - The temperature at which the solid and liquid phases of a substance are in equilibrium at atmospheric pressure. Boiling Point - The temperature at which the vapor pressure of a liquid is equal to the pressure on the liquid (generally atmospheric pressure). Density - The mass of a substance divided by its volume –Extensive - Properties that do depend on the amount of matter present. Mass - A measurement of the amount of matter in a object (grams). Weight - A measurement of the gravitational force of attraction of the earth acting on an object. Volume - A measurement of the amount of space a substance occupies. Length