The group I metals

Question 1

The physical properties of the group I metals

Answer 1

1. good conductors of heat and electricity
2. Soft
3. low density
4. low melting and boiling points
5. they are shiny in appearance

Question 2

physical Trends in group I metals down the group

Answer 2

1. softness increases
2. density increases
3. melting points decrease

Question 3

chemical trends in group I metals

Answer 3

Reactivity increases down the group

Question 4

Group I reaction avec l’eau

Answer 4

They will react with water to form hydrogen and a metal oxide

Question 5

word equation for a Group I metal reacting with water

Answer 5

metal + water —> metal hydroxide + hydrogen

Question 6

chemical equation of a Group I metal reacting with water

Answer 6

Let X be the group 1 metal
2X(s)+2H2O(s)→2XOH(aq)+H2(g)

Question 7

what calour will universal indicator turn when added to a trough that had water and a Group I metal

Answer 7

purple

Question 8

Group I reactions with chlorine

Answer 8

sodium + chlorine —->sodium chloride

Question 9

Group I reactions with oxygen

Answer 9

when heated then plunged into gas jar of oxygen they will burst into flames and form an oxide that will form a alkaline solution when put in water

Question 10

Why do they react so similarly

Answer 10

this is because they have the same number of valence electrons

Question 11

why are they so reactive

Answer 11

This is because they only need to lose one electron

Question 12

what coloured compounds do they form

Answer 12

They form white colored compounds that dissolve to make colorless solutions

Question 13

why does the reactivity increase down the period

Answer 13

the negatively charged valence electron get further and further away from the positively charged nucleus so less effort is require to lose the electron

Question 14

They react in oxygen to form

Answer 14

4Li(s) + O2(g) —-> 2LiO(s)

Question 15

what colours will the indicators turn

1. litmus paper
   2.Phenolphthalein
2. methyl orange

Answer 15

1. Blue
2. purple
3. yellow

Question 16

which ion is responsible for the resulting alkaline nature of the solution

Answer 16

It is the hydroxide