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chemistry11/9 > AQA unit 1 chemistry > Flashcards

AQA unit 1 chemistry Flashcards

1
Q

what is an element

A

a substance made of one type of atom

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2
Q

what is a compound

A

a substance made of two or more types of atom chemically bonded together

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3
Q

what is a mixture

A

two or more elements and compounds not chemically bonded together

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4
Q

is oxygen an element, compound or mixture

A

an element

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5
Q

is carbon dioxide an element, compound or a mixture

A

a compound

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6
Q

is air an element, compounds or a mixture

A

a mixture

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7
Q

how many carbon atoms are in CO2

A

there is one atom

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8
Q

how many chlorine atoms are in Al3Cl6

A

six chlorine atoms

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9
Q

how many different elements are in C6H12O6

A

three different elements(carbon. Hydrogen and oxygen)

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10
Q

what is the centre of an atom called

A

the nucleus

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11
Q

what are three subatomic particles in an atom

A

protons, electrons and neutrons

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12
Q

where are protons and neutrons located in the atom

A

in the nucleus

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13
Q

where are electrons located

A

in the shells (energy levels)

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14
Q

what is the charge of a neutron

A

zero

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15
Q

what is the mass of a proton, electron and neutron

HINT-pen101

A

1,0,1

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16
Q

how many electons can you put in the first 3 shells

A

2,8,8

17
Q

who came up with the plumb pudding model

A

JJ Thompson

18
Q

who said that the atom had a dense nucleus with electrons in orbit

A

rutherford

19
Q

who said the electrons were in the shells

A

niels bohr

20
Q

who discovered the neutron

A

james chadwick

21
Q

what are the elements in group 1 called in the periodic table

A

alkali metals

22
Q

what are the elements on group 7 called

A

halogens

23
Q

what are the elements in group 0 called

A

noble gases

24
Q

why are the noble gases( group 0) unreactive

A

they all have a full outer shell

25
Q

what happens to the reactivity down group 1

A

they get more reactive down the group

chemistry11/9 (1 decks)

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