(P2)Groups In The Periodic Table

Question 1

Describe the physical properties of alkali metals (GROUP 1)

Answer 1

Good conductors of electricity, shiny, soft, low melting points

Question 2

What do alkali metals form when they react with water?

Answer 2

Metal hydroxide + hydrogen

Question 3

Why does the reactivity of alkali metals increase as you go down group 1?

Answer 3

The number of electron shells increases, so there is a weaker force of attraction between the outer electrons and the nucleus (due to the shielding of inner electron shells), so they are lost more easily

Question 4

What group are the halogens in?

Answer 4

Group 7

Question 5

Halogens react with metals to produce compounds called what?

Answer 5

Metal halides

Question 6

Why do halogens get less reactive as you move down group 7?

Answer 6

Outer shells get further away from nucleus, more shielding from inner electrons, force of attraction between nucleus and electrons gets weaker, electrons gained less easily, less reactive

Question 7

How can you demonstrate a halogen displacement reaction?

Why is this a redox reaction?

Answer 7

Add a halogen solution to a metal halide solution, then see if the mixture darkens.

Because oxidation and reduction are occurring at the same time

Question 8

Why are the noble gases inert?

Answer 8

They have a full outer shell of electrons so they don’t need to react