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9 Cards in this Set

  • Front
  • Back

Particle Theory of Matter:

-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

What is the difference between Pure Substances and Mixtures?

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

-Mixture: made of two or more pure substance

What are the two kinds of pure substances?

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

-Compound: Can only be broken down by chemical means

What are the two kinds of mixtures?

-Heterogeneous: Different parts are visible

-Homogeneous: Different phases/parts not visible

What is the difference between physical and chemical properties?

-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

List three chemical properties.

-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

What is the difference between physical and chemical changes?

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

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

Six major signs of a chemical change:

-bubbles forming

-emits smell

-drastic change of colour

-precipitate forminglight is emitted

-change of temperature

Compare and contrast qualitative and qualitative observations.

-Similar: Used to describe physical properties

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