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GCSE chemistry > C1 > Flashcards

C1 Flashcards

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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

Who suggested that electrons orbited the nucleus

A

Bohr

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9
Q

Who provided experimental evidence for neutrons

A

Chadwick

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10
Q

What is the atomic number

A

Amount of protons

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11
Q

What is the period table arranged in

A

Atomic number

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12
Q

What is the mass number

A

Total number of particles in the nucleus

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13
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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14
Q

What would you see when potassium reacts with water

A

Lilac flame

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15
Q

What does filtration do

A

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

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16
Q

What is crystallisation

A

Sepersates a soluble solid from a solvent

17
Q

Give an example of fractional distillation

A

Ethanol and water

18
Q

How does fractional distillation work

A

Use the fact that liquids have different boiling points

19
Q

Why does paper chromatography work

A

Some compounds are more soluble than others

20
Q

What does plum pudding suggest

A

Negative electrons were embedded in a ball of positive charge

21
Q

Who proposed the nuclear model

A

Rutherford

22
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.

23
Q

explained how the atom was discovered in stages

A

-Dalton suggested atoms were tiny hard spheres
-at the end of the 1800s Thompson discovered the electron
-thompson proposed the plum pudding
-proton was discovered
-bohr then suggested electrons were orbiting the nucleus
Chadwick discovered neutrons in 1932

GCSE chemistry (18 decks)

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