Metal with oxygen

How are metal oxides formed?

• When metals react with oxide.
• When metals react with water.
• When metals react with air.
• When metals react with oxygen.

Which of the following reactions produces calcium oxide?

• calcium and oxide
• calcium and water
• calcium and air
• calcium and oxygen

Which of the following is an example of an oxidation reaction?

• Ca  +   O₂ --> CaO
• Na₂O  + H₂O --> NaOH
• Fe₂O₃   + CO --> Fe   +  CO₂
• All of the choices are oxidation reactions.

Oxygen + Iron →

• Iron Hydroxide

• Iron Oxate

• No reaction

• Iron Oxide

Oxygen + Copper →

• No reaction

• Copper Hydroxide

• Copper Oxate

• Copper Oxide

Lithium + Oxygen →

• Lithium Hydroxide

• No reaction

• Lithium Oxide

• Lithium Oxate

In a word equation, the starting chemicals are called...

• reactants

• products

• ingredients

magnesium + oxygen --> magnesium oxide

If you started with 5g of magnesium and 2.5g of oxygen, what mass of magnesium oxide would be produced?

• 5g

• 2.5g

• 7.5g

• 10g

The rusting of iron is an example of

• a reduction reaction.
• an oxidation reaction.
• a reaction of iron with water.
• a reaction that dissolves iron.

Metals that react quickly/strongly with water and acids are called?

• Reactive
• Unreactive
• Dangerous
• Corrosive