Unit 3 - Periodic Table: GROUP 1 ALKALI METALS

Question 1

Name 5 of these metals

Answer 1

Lithium

Sodium

Potassium

(Rubidium)

(Caesium)

Question 2

How many electrons do these metals have in their outer shell? What does this mean?

Answer 2

1

This means they are reactive

Question 3

What sort of density do alkali metals have?

What are the first 3, and what does this mean?

Answer 3

Very low

The first 3 are less dense than water, meaning they float on it

Question 4

As you go down group one..

Answer 4

The metals:

• Become more reactive (because the outer electron is more easily lost because its further away from the nucleus)
• have lower melting and boiling points

Question 5

What are the alkali metals keen to loose? Why?

Answer 5

Their one outer shell electron to form a 1+ ion

Question 6

What bonding do alkali metals ONLY do?

Answer 6

Ionic

Question 7

What do they produce when they react with non-metals?

Answer 7

Ionic compounds containing ions with a 1+ charge

These compounds dissolve in water to form colourless solutions

Question 8

What do lithium, sodium and potassium do when reacted with water?

Answer 8

They float and move around and fizz and produce hydrogen

Question 9

What do the metals form when they react with water?

Answer 9

Hydrogen gas and a metal hydroxide that dissolve in water to form an alkaline solution

Question 10

What is the equation for the reaction between water and an alkali metal?

Answer 10

Metal + water → metal hydroxide + hydrogen