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Chemistry terms P. 5

Chemistry Terms for Mrs. Goldschmidt's class

Chemistry study of matter and the changes it undergoes
matter anything that has mass and occupies space
energy the ability to do work
mass a measure of the quantity of matter & does not change with position
weight a measure of the force of attraction of one object to another & can change with position
steam/water vapor water in the gaseous state
viscosity resistance of liquid flow
miscible liquids that are soluble in all proportions
immiscible not soluble in all proportions and when shaken together, will form a cloudy mixture or separate
diffusion describes the mixing of gases.
pure substances single chemical composed of the same type of matter, particles and can be both elements and compounds
elements made of a single type of atom
atom smallest particles that retains the properties of the elements & can not be broken down into smaller atoms
what is scientific data?
what are the 3 component parts of a measured value?
Name a System of measurement. Length/Mass/Temperature/Time/Amount of Substance
What is the metric system or SI? Why is it important?
metre/meter is equal to?
kilograms is equal to?
go find the numerical quantity, unit & name of a substance
how was the meter defined? And later redefined?
Intensive Properties based on things internally (inside); doesn't change properties; doesn't depend on how much matter Example: boiling point, state of matter, density
Extensive Properties based on things outside; changes properties; depends on the amount of matter Example: volume, mass, size
Homogeneous same composition throughout; mixed permanently (unless separated) Example: sugar dissolving in water
Heterogeneous varied composition based on position; most dense solution stacks from the bottom upward Example: salad dressing, oil in water
Chemical Properties can only be observed through a chemical change and can't be touched Example: flammability, toxicity, burning Observed Chemical Changes: light, heat, gas, color change, odor, sound
Physical properties stays the same down to the molecular level; produces a substance that looks different but is still the same Example: freezing water, gas -> liquid
Pure Substances have definite composition; can be chemically bonded; either compound or element; doesn't vary and can't be filter Example: salt or sugar
Mixtures not chemically bonded. physical mix; composition varies by how it was made; can be filtered Example: salt water (salt dissolved)
Created by: jennahamilton



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