AQA unit 1 chemistry

Question 1

what is an element?

Answer 1

a substance made of one type of atom

Question 2

what is a compound?

Answer 2

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

Question 3

what is a mixture?

Answer 3

two or more elements and compound not chemically bonded together

Question 4

is oxygen an element, compound or mixture?

Answer 4

an element

Question 5

is carbon dioxide an element,compound or a 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

one 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 nucleus

Question 11

what are 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 in the atom

Answer 13

the the shells (energy levels)

Question 14

what is the charge of a neutron

Answer 14

zero

Question 15

what is the mass of a proton, electron ans neurton? (HINT - PEN 101)

Answer 15

1,0,1

Question 16

how many electrons can u fit in the first three shells?

Answer 16

2,8,8

Question 17

who came up the with plum pudding model

Answer 17

JJ Tomson

Question 18

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

Answer 18

ernest Rutherford

Question 19

who said that the electrons were in shells

Answer 19

niels bohr

Question 20

who discovered the neutron

Answer 20

james chadwick

Question 21

what are the elements in group 1 called

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

nobel gases