Year 8 Periodic Table revision

As you go down group 1 the elements get ____ reactive

As you go down group 7 the elements get ____ reactive

Organize these options into the right categories

Groups:

(a) Group 1

,

(b) Group 7

• react with water

• halogens

• react with metals and hydrogen

• reactivity increases as you go down group

• reactivity decreases as you go down group

• alkali metals

• soft, dull on the outside, shiny inside metals

• boiling point increases as you go down the group

Organize these options into the right categories

Groups:

(a) Metal oxide

,

(b) Non-metal oxide

• alkaline solutions

• made from metal and oxygen

• pH > 7

• made from a non-metal and oxygen

• acidic solutions

• pH < 7

Match the following

• NO₂

• Sodium oxide

• Na₂O

• Potassium oxide

• SO₂

• Nitrogen dioxide

• CaO

• Sulphur dioxide

• K₂O

• Calcium oxide

How many atoms are there in the compound H₂SO₄

• 4

• 3

• 8

• 7

How many elements are there in the compound H₂SO₄

• 4

• 3

• 8

• 7

What is shown here?

• Element

• Compound

• Mixture

How many molecules are shown here?

• 14

• 7

Mendeleev left ____ in his periodic table for elements he hadn't discovered yet.