C1 Atomic structure

Question 1

mass and charge of electron proton and a neutron

Answer 1

electron, -1. 0

neutron. 0. 1
proton. +1. 1

Question 2

what does the mass number and the atomic number represent and where does it go in an elements symbol

Answer 2

mass no= total neutrons and protons

atomic= amount of protons but it also shows amount of electrons

Question 3

what decides what type of element something is

Answer 3

the amount of protons an element has

Question 4

give the name of a process that can separate mixtures

Answer 4

chromatography

Question 5

what is an isotope

Answer 5

an element that has the same amount of protons but a different amount of neutrons shown on the periodic table

Question 6

how did new evidence from the scattering experiment lead to change

Answer 6

they fired alpha particles at thin sheets of gold. too many deflected back too them, proving there had to be a positive charge somewhere

Question 7

in chronological order, list each scientist and their development of the nuclear model

Answer 7

john dalton- plum pudding model
rutherford- proved the plum pudding was wrong and that there was space in an atom
Bohr- composed the modern day nuclear model

Question 8

give three purification and separation techniques and when they should be used

Answer 8

filtration- insoluable solids from liquids
crystalisation and evaporation- soluble solids from solutions
distillation- used to seperate out two different solutions

Question 9

size of atoms

Answer 9

10 to the power of -9

0.1 nm

Question 10

what does an elements group represent-

what does an elements period represent-

Answer 10

• the number of electrons it has on its outer shell

- the number of outer shells it has

Question 11

what happens as you go down the group on the periodic table in terms of reactivity and why

Answer 11

the element becomes more reactive because the more shells an atom has, the easier it is for the electron on the outer shell to escape from the positive charge of the nucleus

Question 12

a nucleus always has a what charge

Answer 12

positive

Question 13

properties of metals

Answer 13

conduct heat and electricity
solid at room temperature
high melting and boiling points

Question 14

properties of group 0 elements

Answer 14

extremely unreactive

low melting and boiling points

Question 15

differences between transition metals and group 1 metals

Answer 15

group 1 is much more reactive and less strong with lower melting and boiling points

Question 16

what happens to group 7 elements as you go down the group and why

Answer 16

they become less reactive because the positive pull of the nucleas finds it harder to reach the negative attraction of an electron when theres multiple shells in the way

Question 17

what is a transition metal

Answer 17

a metal that isn’t in group 1

Question 18

how do you calculate relative atomic mass

Answer 18

                          100

Question 19

you’re given two hrmicals, such as nickel oxide and carbon. youre asked why will carbon extract nickel from nickel oxide

Answer 19

find out which one is more reactive (in this case carbon) and just say because its more reactive

Question 20

what was chadwicks role in the creation of the modern day atom and why was it important

Answer 20

he discovered the neutron

important because it drived the theory of isotoped which could vary in their amount of neutrons