first ionisation energy

Question 1

what is first ionisation energy

Answer 1

the enemy requires to remove an electron for each atom in 1 mole of gaseous atoms

Question 2

equation

Answer 2

O(g) - 0(g)+ + e-

Question 3

trends down with group

Answer 3

ie decreases down the group

because electron being removed is further away from the nucleus,

more inner shells to shield the outer electron

electrostatic attraction is lower

Question 4

trends across periods

Answer 4

ie increases across periods

nuclear charge increases, but shielding due to inner shells says the same

electrostatic force nucleus + outer electrons increases

Question 5

amaomiles across the period

Answer 5

group 3 - remove electron from higher energy subshell

group 6 - electron pair up and repel in an orbital