Question

Do all question carefully please

Answer 1

Answer:

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Answer 2

Answer:

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1)

• K = element
• O 2 = Compound.
• NaCl = Compound
• Al = element
• Ca = element
• CaCl2 = Compound
• H2 = Compound

2)

• a. There are two different elements are combined to form sulphur dioxide. Element are sulphur and oxygen.
• b. there are two atoms of oxygen are combined with each sulphur.

3)

• a. hydrogen and oxygen are two elements are combined to form water.
• b. H2O tells that two atom of hydrogen are combined with one atom of Oxygen.

5)

• a. MgO - magnesium oxide
• b.NaCl - sodium chloride
• c. CaCl2 - calcium chloride

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