C1:atomic structure

Question 1

wh at is the mass of a proton

Answer 1

1

Question 1

what is the mass of a neutron

Answer 1

1

Question 2

what is the mass of an electron

Answer 2

1/2000

Question 3

what are compounds

Answer 3

two or more elements chemically
combined

Question 4

name 4 ways mixtures can be separated

Answer 4

filtration, crystallisation, simple distilation,
fractional distilation

Question 5

explain what happens in simple distillation

Answer 5

heating a mixture of liquids causing it to evaporate then it is cooled and condenses into a separate liquid.

Question 6

what is fractional distillation

Answer 6

heating up the mixture and separating the different compounds knowing they have different boiling points

Question 7

who discovered the plum pudding model

Answer 7

jj Thompson

Question 8

what did jj thompson discover

Answer 8

the electron

Question 9

what is the plum pudding model

Answer 9

that the atom is a ball of positive charge with negative charge inside of it

Question 10

What did rutherford do to get the nuclear model

Answer 10

fired high speed alpha particles at a gold coil

Question 11

what were rutherfords observations

Answer 11

the mass was concentrated a the centre and the nucleus was charged

Question 12

what did niels bohr discover

Answer 12

the electrons orbit the nucleus

Question 13

what did james chadwick discover

Answer 13

the neutron

Question 14

how did new evidence from the scattering
experiment led to a change in the atomic model

Answer 14

the alpha scattering led to the plum pudding model which replaced the nuclear model

Question 15

how do you calculate the calculate the
the relative atomic mass of an element given the percentage abundance of its isotopes.

Answer 15

times the atomic mass with the amount of an element and add it with other elements

Question 16

what did the early periodic table look like

Answer 16

measured in atomic weight, ordered wrongly

Question 17

how did mandeleev solve this problem

Answer 17

left gaps, in some places he ordered it in atomic , allowed him to predict future elements

Question 18

what was wrong with Mendeleev’s table

Answer 18

missing isotopes, unable to tell where hydrogen was, from one elemnt to another the increase in atomic number was not correct

Question 19

what did mandeleev order his periodic table in

Answer 19

relative atomic mass

Question 20

what happens as you go down group 1

Answer 20

the reactivity increases as you go down

Question 21

what happens as you go down group 7 elements

Answer 21

reactivity decreases and boiling and melting points increase

Question 22

what can a more reactive halogen do

Answer 22

displace a less reactive halogen from a aqueous solution from its salt