module 3.1 - the periodic table

Question 1

the energy needed to remove one mole of electrons from one mole of gaseous atoms

Answer 1

first ionisation energy

Question 2

the reason for ionisation energy drop between groups 2 and 3

Answer 2

sub-shell structure

Question 3

the reason for ionisation energy drop between groups 5 and 6

Answer 3

electron repulsion in p-orbitals

Question 4

the general ionisation energy trend across a period

Answer 4

increase

Question 5

three factors that affect the size of ionisation energy

Answer 5

nuclear charge, atomic radius, shielding

Question 6

the forces that exist between carbon sheets in graphite

Answer 6

weak ionic bonds

Question 7

group 2 compound used in agriculture to neutralise acidic soils

Answer 7

calcium hydroxide

Question 8

group 2 compounds used as antacids (indigestion tablets)

Answer 8

magnesium hydroxide and calcium carbonate

Question 9

general trend in reactivity as you go down group 7

Answer 9

decreases

Question 10

test for halides

Answer 10

dilute nitric acid and silver nitrate solution is added, then a precipitate is formed