ionisation energy

Question 1

What is first ionisation energy

Answer 1

-First ionisation energy is the energy required to remove 1 electron from each atom in 1 mole of gaseous atoms producing one mole of 1+ ions

Question 2

What is the second ionisation energy

Answer 2

-Second ionisation energy is the energy required to remove the second electron

Question 3

What are the 3 factors affecting ionisation energy

Answer 3

• Atomic radius
  -Nuclear charge
  -Shielding

Question 4

What type of reaction is ionisation

Answer 4

-Endothermic because ionisation requires energy and its positive value

Question 5

What is successful ionisation

Answer 5

-The removal of more than 1 electron from the same atom

Question 6

What is the ionisation trends

Answer 6

-Ionisation energy decreases down the group
-Ionisation energy increases as we go across a period

Question 7

Explain the decrease in 1st ionisation energy from Be to B

Answer 7

-Boron has a lower ionisation energy then Be bc its outer electron is removed from a 2p sub shell which is higher in energy than 2s sub shell
-Therefore the 2p electron is easier to remove

Question 8

Explain the decrease in 1st ionisation energy from N to O

Answer 8

-Oxygen has a lower ionisation energy than Nitrogen bc electrons pairing begins in the 2p subshell of oxygen which repel each other making it easier to remove an electron from O compared with N