Question

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Answer 1

Answer:

1. carbon element
2. 8 of sulphur and aur of phosphorus.
3. a unit of mass used to express atomic and molecular weight equal to one twelfth of the mass of an atom carbon 12.
4. sodium chloride and calcium carbonate.

Answer 2

Answer:

1 Carbon element

2 a. atomic number =16, element = sulphur, atomicity = 8

b. atomic number = 15, element = phosphorus, atomicity = 4

3 a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

4 sodium chloride and calcium carbonate.

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