S1 Reacting Elements

Models can be used to show how atoms arrange themselves. Which of the diagrams to the below shows an element?

• A

• B

• C

• D

Lithium, sodium, potassium, rubidium and caesium belong to which group? (You may wish to use the periodic table to help you).

• Noble gases

• Alkali metals

• Transition metals

• Halogens

Which of these elements is a conductor of electricity? (You may wish to use the periodic table to help you).

• Sulphur

• Chlorine

• Hydrogen

• Aluminium

Which two elements show similar chemical properties?

• Li and C

• C and P

• Br and Kr

• Li and Rb

As you go down Group 7 of the periodic table the reactivity of the elements...

• Increases

• Decrease

• Stay the same

• They are all unreactive

Which line of the table correctly describes what happens if 1 gram of a catalyst is involved in a chemical reaction?

• Unchanged, 0

• Faster, 0

• Unchanged, 1

• Faster, 1

Which of the following is the correct chemical test for oxygen gas?

• A glowing splint relights

• Limewater turns milky

• A lit splint pops

• Blue litmus turns red

Which of the following is not a sign of a chemical reaction taking place?

• A gas is produced

• A solid is formed

• A solid melts into a liquid

• A colour change takes place

Which of the following is an example of a chemical reaction?

• Petrol burning

• Nail varnish drying

• An ice cube melting

• Sugar dissolving in tea

Roughly how many elements are there in the periodic table?

• 10

• Less than 50

• 80

• Over 100