9.6 METALS AND OXYGEN

Question 1

State the order of reactivity, starting with the lowest.

Answer 1

Gold
Copper
Iron
Zinc
Magnesium
Sodium

Question 2

Metal + Oxygen -> ?

Answer 2

Metal Oxide

Question 3

Magnesium + Oxygen -> ?

Answer 3

Magnesium oxide

Question 4

How does sodium react with oxygen?

Answer 4

1. Burn vigorously
2. Mixture of products (sodium oxide, sodium peroxide)
3. Reacts with oxygen without heating. As soon as you cut, the shiny surface reacts with oxygen. This makes white sodium oxide.

Question 5

How does zinc react with oxygen?

Answer 5

If you sprinkle zinc powder into Bunsen flame, you see bright white sparks. Zinc oxide forms.

Question 6

How does copper react with oxygen?

Answer 6

1. Does not burn
2. Forms black copper (copper oxide)

Question 7

How does gold react with oxygen?

Answer 7

No reaction

Question 8

What is reactivity?

Answer 8

Tendency of a substance to take part in chemical reactions.

Question 9

How does magnesium react with oxygen?

Answer 9

1. Magnesium is metal
2. Combustion reaction is vigorous
3. There is a bright white flame
4. Magnesium reacts with oxygen when you do not heat it
5. Overtime, its surface atoms react with oxygen. Makes a thin layer of magnesium oxide (corrosion reaction)