Exam Review: Chemistry

Front 1

Particle Theory of Matter:

Back 1

-All matter is made of particles

-The particles are in constant motion. Particles move faster with more energy

-Different substances are made of different particles

-Particles are attracted to each other

-The space between particles are larger than the particles themselves

Front 2

What is the difference between Pure Substances and Mixtures?

Back 2

-Pure substance: same physical and chemical property, cannot be broken down by physical means

-Mixture: made of two or more pure substance

Front 3

What are the two kinds of pure substances?

Back 3

-Elements: Cannot be broken down into simpler parts by chemical or physical means

-Compound: Can only be broken down by chemical means

Front 4

What are the two kinds of mixtures?

Back 4

-Heterogeneous: Different parts are visible

-Homogeneous: Different phases/parts not visible

Front 5

What is the difference between physical and chemical properties?

Back 5

-Physical property: one that a substance has on its own

-Chemical property: one which describes how a substance can undergo changes to become one or more new substance

Front 6

List three chemical properties.

Back 6

-Flammability: how easy it is to ignite

-Reaction with acids: how it reacts in presence of acid

-Chemical stability: how quickly it forms another substance

Front 7

What is the difference between physical and chemical changes?

Back 7

-Physical change: does not change the particles that make the substance, reversible

-Chemical change: always creates something new that was not there before

Front 8

Six major signs of a chemical change:

Back 8

-bubbles forming

-emits smell

-drastic change of colour

-precipitate forminglight is emitted

-change of temperature

Front 9

Compare and contrast qualitative and qualitative observations.

Back 9

-Similar: Used to describe physical properties

-Difference: Quantitative describes something with numbers, qualitative describes something using words