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yr 2 science eye > chapter 3 > Flashcards

chapter 3 Flashcards

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1
Q

definition of elements

A

a pure substance that cannot be broken down into simpler substances

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2
Q

properties of elements

A
  • pure substance
  • cannot be broken down into simpler substances
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3
Q

definition of compounds

A

a pure substance made by 2 or more elements chemically combined together

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4
Q

properties of compounds

A
  • pure substance
  • made by 2 of more elements chemically combined together
  • fixed mass ratio
  • not easily seperated through physical means/ can only be seperated using chemical means
  • do not have the same properties as its constituents
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5
Q

defenition of mixtures

A

mixtures are made of 2 or more elements and or compounds that are not chemically combined together

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6
Q

properties of mixtures

A
  • not chemically combined together
  • easily seperated
  • retains the properties of its constituents
  • no fixed ratio
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7
Q

types of mixtures

A
  • suspensions
  • solutions
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8
Q

definition of solution

A

a soluble mixture in which the solute dissolves completely in another substance

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9
Q

properties of a solution

A
  • particles of solute cannot be seen
  • light can pass through fully
  • the solute does not settle down into solid deposits
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10
Q

rate of dissolving

A

how quickly a solute dissolves in a solvent

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11
Q

factors of rate of dissolving

A
  • temperature of solvent
  • rate of stirring
  • surface area of solute
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12
Q

factors explained

A
  • the higher the temperature of the solvent, the higher the rate of dissolving of the solute in the solvent
  • the faster the rate of stirring, the higher the rate of dissolving the solute in the solvent
  • the higher the surface area, the faster the rate of dissolving of the solute in the solvent
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13
Q

definition of solubility

A

how well the solute dissolves in a fixed volume of a solvent

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14
Q

factors of solubility

A
  • type of solute
  • type of solvent
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15
Q

definition of suspensions

A

an insoluble mixture which contains insoluble substances in a solvent

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16
Q

properties of suspensions

A
  • insoluble substances can be seen
  • light cannot pass through fully
  • insoluble substances can settle down into solid deposits
17
Q

alloys defenition

A

a mixture of metal with other elements

yr 2 science eye (12 decks)

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