Question

( 502
(N) Sa
1. Define element and compound
Iron and sulphur both are elements whereas iron sulphide is a compound, explain
3. Differentiate between symbol and formula
4. What does the following symbols illustrate ?
(ii) 30
(III) 209
(v) Ni
(vi) Na
5. Write down the formulae of the following compounds:
(1) Carbon dioxide (ii) Calcium oxide
(iii) Water
6. Write down the chemical names of the following compounds:
(1) N2
(i) CO2
(iv) H20
7. Give two examples of each of the following:
(iv) Compounds
(vii) Natural elements
(ii) Non-metals (v) Elements
(viii) Diatomic gases
(iii) Metalloids (vi) Radioactive elements
(ix) Polyatomic molecules
(iii) CaO
(i) Metals
VE ONE WORD FOR THE FOLLOWING:​

Answer 1

Answer:

1. 30
2. H2O

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Answer 2

Answer:

2 question a) 209

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