aqa unit unit 1 chemistry

Question 1

what is an element

Answer 1

its one type of atom

Question 2

what is a compound

Answer 2

a substance made of two or more that are chemically bonded together

Question 3

what is a mixture

Answer 3

two or more elements and compounds not chemically bonded together.

Question 4

is oxygen an element compound or element

Answer 4

an element

Question 5

is carbon dioxide an element compound or mixture

Answer 5

a compound

Question 6

is air an element compound or a mixture

Answer 6

a mixture

Question 7

how many carbon atoms are in CO2

Answer 7

1 carbon atom

Question 8

how many chlorine atoms are in AL3CI6

Answer 8

six chlorine atoms

Question 9

how many different elements are in C6H12O6

Answer 9

three different elements(carbon,hydrogen,oxygen)

Question 10

what is the centre of an atom called

Answer 10

the nuclease

Question 11

what are the three subatomic particles in an atom

Answer 11

protons electrons and neutrons

Question 12

where are protons and neutrons located in the atom

Answer 12

in the nucleus

Question 13

where are electrons located

Answer 13

in the shells

Question 14

what is the charge of the neutron

Answer 14

zero

Question 15

what is the mass of a proton electron and neutron

Answer 15

1,0,1

Question 16

how many electrons can you fit in the first three shells

Answer 16

2,8,8

Question 17

who came up with the plum pudding model

Answer 17

jj thomphson

Question 18

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

Answer 18

ernest rutherfold

Question 19

who said that the electrons were in the shells

Answer 19

niels bohr

Question 20

who discovered the neutrons

Answer 20

james chadwick

Question 21

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

Answer 21

alkali metals

Question 22

what are the elements in group 7 called

Answer 22

halogens

Question 23

what are the elements in group 0 called

Answer 23

noble gasses

Question 24

why are the noble gasses unreactive

Answer 24

they all have a full outer shell

Question 25

what happens to the reactivity down group 1

Answer 25

they get more reactive down the group