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Topic 1: ex. 1

classifying mass

TermDefinition
Matter anything that has mass and takes up space.
Pure Substance Has consistent chemical and physical properties throughout
Element A pure substance that only contains 1 type of atom, cannot be broken down into simpler chemical components using chemical means.
Compound A substance made up of 2 or more different elements chemically combined into a fixed ratio
Mixture of Substances A combination of different substances
Homogeneous Mixture A mixture with uniform composition, looks the same throughout and hard to separate.
Solution homogeneous mixture of 2 or more substances
Heterogeneous Mixture A mixture where the components are not uniformly distributed, does not appear the same throughout, and is easy to separate.
Physical Change A change from one state to another (solid, liquid, or gas) without a change in chemical composition. Ex. change of state, dissolving, freezing, odor, temp change, etc.
Chemical change Any change that causes a new substance to be formed (a change in chemical composition) Ex. color change, odor, rusting, change in temperature, producing bubbles, etc.
Nonmetal Characteristics Brittle, not malleable, not shiny, lower boiling point, poor electrical conductors, etc.
Metal Characteristics Good conductor of electricity,, density, hard, shiny and lustrous, high melting point, etc.
Metalloids Characteristics Shiny, brittle solids, semi conductors, average heat conductivity, malleable, low elasticity, etc.
order of size of elements Small → Large Atoms → Elements → Moleucules & Compounds
Created by: aye.grace
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