Properties of Metals

Question 1

Metals

Answer 1

Electropositive elements
Reducing Agents
Reacts with acids to liberate Hydrogen ions
Reacts with oxygen to form oxides

Question 2

Activity Series of Metals

Answer 2

Potassium (K)
Sodium (Na)
Calcium (Ca)
Magnesium (Mg)
Aluminium (Al)
Zinc (Zn)
Iron (Fe)
Tin (Sn)
Lead (Pb)
Copper (Cu)
Mercury (Hg)
Silver (Ag)
Gold (Au)

Question 3

Burn readily in air to form the oxide

Answer 3

Potassium, Sodium and Calcium

Question 4

Form oxide when heated in air

Answer 4

Magnesium, Aluminium, Zinc, Iron, Tin, Lead, Copper, Mercury

Question 5

Physical properties of Metals

Answer 5

1. High Melting and boiling points
2. Lustre
3. Malleable
4. Ductile
5. Sonorous
6. Hard but not brittle
7. Good conductors of electricity
8. Relatively high densities

Question 6

Very reactive metals

Answer 6

Potassium, Sodium, Calcium and Magnesium

Question 7

Moderately reactive metals

Answer 7

Aluminium, Zinc, Iron, Tin, Lead

Question 8

Least reactive

Answer 8

Copper, Mercury, Silver, Gold

Question 9

Extraction of Metals

Answer 9

1. Chemical and thermal reduction - Less electropositive metals (Pb, Zn, Fe, Sn)
2. Electrolytic reduction - More electropositive metals (K, Na, Ca, Mg)

Question 10

Sodium - Physical Properties

Answer 10

1. Silvery Solid with metallic lustre
2. Floats on water
3. Low melting point
4. Good conductor of electricity and heat