2.a Group 1 ( alkali metals )

Question 1

what is the reactivity trend of group 1 metals

Answer 1

as you go down group 1 the elements become more reactive

Question 2

what do all group 1 metals do when they react with water

Answer 2

react vigorously and fizz

Question 3

what does the reaction of group 1 metals and water produce

Answer 3

hydrogen ( fizzing seen ) + metal hydroxide = alkaline ( reason why called alkali metals)

Question 4

how can you determine which group 1 metal is most reactive from the reaction of water

Answer 4

rate of reaction
( the time taken for a lump of the same size of each element to react completely with the water and disappear)

the quicker the rate of reaction = more reactive

Question 5

why do group 1 elements get more reactive as you go down the group

Answer 5

1. as you go down the group the outermost electron is in a shell that’s further from the nucleus
2. = attraction between outermost electron and the nucleus = less
3. as you go down the group atoms get bigger = more shells = weaker attraction= outer electron is more easily lost = metals more reactive

Question 6

2nd way of explain why group 1 metals get more reactive as you go down the group

Answer 6

it is easier to loose the electron from the outer shell and form a bond because the outer electron is less strongly attracted by the positive nucleus cos shielded by shell of negative electrons

Question 7

how can the trend in activity of group 1 elements be shown

Answer 7

through their reaction with water and air

the quicker the reaction the more reactive