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chemistry > random flashcards i can't remember topic > Flashcards

random flashcards i can't remember topic

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1
Q

potable water

A

water that is safe to drink

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2
Q

how does the temp of the surroundings change in exothermic reactions

A

increase

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3
Q

how does the temp of the surroundings change in endothermic reactions

A

decrease

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4
Q

waste water

A

water that has been used eg. rainwater, flushing toilet, usually ends up in rivers

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5
Q

exothermic processes

A

oxidation
combustion
neutralisation

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6
Q

endothermic processes

A

thermal decomposition
sodium hydrogen carbonate+citric acid

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7
Q

how is waste water treated?

A

screening - removes large particles and grit.

this creates sludge with is treated with anaerobic digestion + turned into fertiliser.

and effluent which is treated with aerobic digestion + goes into rivers.

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8
Q

where are protons found in atoms

A

nucleus

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9
Q

what charge do protons have

A

positive

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10
Q

what is peer review

A

when research is checked by other scientists to check for errors or mistakes

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11
Q

how are ions formed

A

when atoms lose or gain electrons

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12
Q

why do atoms form ions

A

to gain a full outer shell of electrons

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13
Q

what group are noble gases found in

A

group 8 / 0

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14
Q

relative mass of protons

A

1

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15
Q

relative charge of protons

A

+1

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16
Q

relative mass of neutron

A

1

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17
Q

relative charge of neutron

A

0

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18
Q

relative mass of electron

A

0

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19
Q

relative charge of electron

A

-1

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20
Q

how do you find the protons, electrons and neutrons on the periodic table

A

16 <— 16 - 8 = 8 neutrons
O
8 <— 8 protons, 8 electrons

21
Q

what ions do acids release in water

A

hydrogen

22
Q

formula of nitric acid

A

HNO3

23
Q

which element relights a glowing splint in a experiment

A

oxygen

24
Q

which element burns with a squeaky pop in an experiment

A

hydrogen

25
Q

which element turns lime water murky in an experiment

A

carbon dioxide

26
Q

which element bleaches damp litmus paper, turning it white

A

chlorine

27
Q

what charge are atoms
positive
neutral
negative

A

neutral

28
Q

ionic bonds=

A

metal + non metal

29
Q

covalent bonds=

A

non metal + non metal

30
Q

metallic bonds=

A

metal + metal

31
Q

does a giant covalent lattice have covalent bonds or weak intermolecular bonds

A

covalent bonds

32
Q

does a giant ionic lattice have covalent bonds or weak intermolecular bonds

A

covalent bonds

33
Q

does a giant metallic lattice have covalent bonds or weak intermolecular bonds

A

covalent bonds

34
Q

does a simple covalent structure have covalent bonds or weak intermolecular bonds

A

weak intermolecular bonds

35
Q

examples of giant covalent lattice
D______
________
________

A

diamond
graphite
graphine

36
Q

examples of simple covalent structure
w____
______ _______

A

water
carbon dioxide

37
Q

what is CH4

A

methane

38
Q

what is C2H6

A

ethane

39
Q

what is C3H8

A

propane

40
Q

what is C4H10

A

butane

41
Q

formula for methane

A

CH4

42
Q

formula for ethane

A

C2H6

43
Q

formula for propane

A

C3H8

44
Q

formula for butane

A

C4H10

45
Q

methane structure diagram

A

’ H
l
H ~~ C ~~ H
l
H

46
Q

ethane structure diagram

A

’ H H
l l
H ~~ C ~~ C ~~ H
l l
H H

47
Q

propane structure diagram

A

’ H H H
l l l
H ~~ C ~~ C ~~ C ~~ H
l l l
H H H

48
Q

butane structure diagram

A

’ H H H H
l l l l
H ~~ C ~~ C ~~ C ~~ C ~~ H
l l l l
H H H H

49
Q
A

chemistry (15 decks)

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