Alkali metals Quiz

1. In which group of the periodic table are the alkali metals found?

a) Group 1
b) Group 2
c) The transition metal block
d) Group 7

2. Which of the following is true about the alkali metals?

They have full outer electron shells
b) They have only 2 electrons in their outer electron shell
c) They have 1 electron in their outer electron shell
d) They have full outer electron shells

3. What type of ion do the alkali metals form when they react with a halogen such as chlorine?

a) An ion with a 2+ charge
b) An ion with a 1- charge
c) An ion with a 1+ charge
d) They do not form ions

4. How are the alkali metals typically stored?

a) In water
b) In a vacuum
c) In air
d) In oil or paraffin

5. What happens to the softness of the alkali metals as you go down the group?

a) They become harder
b) They become softer
c) They become more brittle
d) There is no change

6. Based on your knowledge of the density of the alkali metals; which alkali metal will float on oil?

a) Lithium
b) Sodium
c) Rubidium
d) Caesium

7. What happens in general terms to the density of the alkali metals as you go down the group?

a) It decreases
b) It increases
c) It does not change
d) It varies widely

8. What gas is released when an alkali metal reacts with water?

a) Nitrogen
b) Carbon dioxide
c) Oxygen
d) Hydrogen

9. Which alkali metal reacts violently enough for the released gas to ignite spontaneously?

a) Sodium
b) Lithium
c) Potassium
d) Magnesium

10. What colour is the flame produced above a piece of potassium when it reacts with water?

a) Lilac
b) Brick red
c) Green
d) Yellow

11. What is formed when an alkali metal reacts with water?

a) A neutral solution
b) An acidic solution
c) An alkaline solution
d) A pale green solution

12. What is formed when sodium reacts with chlorine gas?

a) Sodium hydroxide
b) Sodium peroxide
c) Sodium oxide
d) Sodium chloride

13. What colour is the flame produce when lithium is burned in the air?

a) Brick red
b) Pale green
c) Bright yellow
d) White

14. Which of these is a true statement about the density of the alkali metals?

a) They all have a density greater than iron
b) They all have a density less than that of aluminium metal
c) Potassium has a density anomaly compared to the other alkali metals
d) The density of the alkali metals all increase perfectly down the group

15. Which of the equations below correctly describes the reaction between the alkali metal sodium and water?

a) Sodium + water → sodium hydroxide + oxygen
b) Sodium + water → sodium chloride + hydrogen
c) Sodium + water → sodium oxide + hydrogen
d) Sodium + water → sodium hydroxide + hydrogen