C1 Flashcards

1
Q

What is an aqueous solution

A

A substance dissolved in water

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2
Q

What does conservation of mass state

A

No atoms are lost or made during a chemical reaction

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3
Q

What are the 3 methods for separating mixtures

A

Filtration
Crystallisation
Distillation

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4
Q

What is fractional distillation

A

A way of separating miscible liquids

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5
Q

What is paper chromatography

A

A way to separate substances from mixtures in a solution

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6
Q

Who discovered the electron

A

Thompson

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7
Q

What model did Thompson suggest

A

Plum pudding

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8
Q

What is the atomic number

A

Amount of protons

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9
Q

What is the period table arranged in

A

Atomic number

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10
Q

What is the mass number

A

Total number of particles in the nucleus

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11
Q

What is an isotope in

A

Atoms of the same element but with different neutrons so their physical properties differ

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12
Q

What would you see when potassium reacts with water

A

Lilac flame

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13
Q

What does filtration do

A

Separates substances insoluble in a solvent from those that are soluble in a solvent

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14
Q

What is crystallisation

A

Sepersates a soluble solid from a solvent

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15
Q

Give an example of fractional distillation

A

Ethanol and water

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16
Q

How does fractional distillation work

A

Use the fact that liquids have different boiling points

17
Q

Why does paper chromatography work

A

Some compounds are more soluble than others

18
Q

What does plum pudding suggest

A

Negative electrons were embedded in a ball of positive charge

19
Q

what did geiger and Marsden do

A

they fired alpha particles at gold foil, a few alpha particles repelled showing there was some positive charge in the atom.

20
Q

how was the atom discovered

A

early 1800s dalton suggested atoms were tiny, hard spheres that could not be split
end of 1800s thompson discovered electrons and proposed the plum pudding model
rutherford proposed the nuclear model following geiger and marsden
bohr suggested electrons orbited the nucleus
1932 chadwick discovered neutrons