C4.2

Question 1

what is the electron configuration of a basic helium atom

Answer 1

2,8,8,2

Question 2

relative mass of a proton

Answer 2

1 hydrogen atom

Question 3

relative mass of electron

Answer 3

Almost 0

Question 4

Relative mass of neutron

Answer 4

1 hydrogen atom

Question 5

no of electrons =

Answer 5

no of protons

Question 6

atoms in the same element have what?

Answer 6

same no of protons

Question 7

the events in the periodic table are arranged how?

Answer 7

in order of proton number

Question 8

what is given when light is emitted from particular elements?

Answer 8

gives a characteristic line spectrum

Question 9

what is spectroscopy used to do?

Answer 9

discover new elements

Question 10

what did the discovery of some elements depend on

Answer 10

the development of new practical techniques

spectroscopy

Question 11

Boron has a proton no of 5 and a relative atomic mass of 11.
How many 
1. protons are there
2. neutrons
3. electrons
(so like protons and neutrons is 11)

Answer 11

1. 11
2. 11-5= 6
3. (no of protons same as electrons) = 5

Question 12

how do you know what group an element is in using electron configuration?

Answer 12

look at how many electrons in outer shell

Question 13

group 7 elements

Answer 13

want to gain electron

easier higher up table as it’s closer to positive charges

Question 14

group 1 elements

Answer 14

easier to lose when electron is further away from nucleus as less of a bond

Question 15

why do group 1 react so violently with 7?

Answer 15

group 1- lose 1 electron
group 7- gain
so both help to gain a full outer shell