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GCSE AQA CHEMISTRY (PAPER 1) Combined > C One > Flashcards

C One Flashcards

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1
Q

What is an element?

A

Single type of atom

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2
Q

What is an atom?

A

A very small particle

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3
Q

What is a compound?

A

2 or more elements chemically bonded together

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4
Q

What is the mass of electrons?

A

1/2000

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5
Q

How to find number of protons and electrons?

A

Mass number

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6
Q

How to find number of neutrons?

A

mass number - atomic number

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7
Q

What is the formula for amonia?

A

NH3

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8
Q

What is the formula for hydrochloric acid?

A

HCl

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9
Q

What is the formula for sulfuric acid?

A

H2SO4

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10
Q

What is pure?

A

Elements

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11
Q

What are compounds?

A

2 or more elements chemically bonded together

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12
Q

What is a mixture?

A

2 or more elements or compounds not chemically bonded together

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13
Q

How to separate mixtures?

A

Distillation
evaporation
filtration
fractional distillation

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14
Q

What is the plum pudding model?

A

pudding +

electrons dotted throughout -

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15
Q

How was the plum pudding model developed?

A

Alpha gun shot rays at sheet of gold some went straight through others refracted proving electrons

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16
Q

Who discovered the nucleus?

A

Rutherford

17
Q

who discovered neutrons?

A

chadwick

18
Q

who discovered current model?

A

Bohr

19
Q

What do groups tell?

A

Number of electrons in outer shell

20
Q

What do periods show?

A

number of shells

21
Q

Why is the overall charge of an atom 0?

A

+ and - cancel each other out

22
Q

What is an ions overall charge?

A

+/-

23
Q

What do metals loose becoming….

A

electrons becoming positive

24
Q

What do none metals lose becoming….

A

gain electrons becoming negative

25
Q

How did Newlands arrange the periodic table?

A

(octaves) mass into pattens

26
Q

How did Mendeleev arrange the periodic table?

A

By mass
left spaces
predicted properties - correct

27
Q

What are the nobel gasses properties?

A

Full outer shell
un-reactive
used in neon lights

28
Q

What are the halogens (group 7 properties)?

A 
non metal
more reactive at top
share electrons in pairs
very reactive only want to gain 1
high boiling point at bottom
gain electrons (reduction)
react violently with group one
29
Q

What are the alkali metals properties?

A 
React with water
easy to cut
kept in oil
more reactive as you go down group
hight boiling points at top
lose 1 electron
30
Q

What is energy in?

A

melting & evapourating

31
Q

what is energy out?

A

condensing and freezing

32
Q

What are the properties of a soild?

A

not flowing
can’t be compressed
thick structure
in fixed position

33
Q

What are the properties of a liquid?

A

Some movement
not in fixed position
can’t be compressed

34
Q

What are the properties of a gas?

A

lots of movement
flow
can be compressed

GCSE AQA CHEMISTRY (PAPER 1) Combined (6 decks)

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