Question

16. An element Barium has atomic number 56. Look up
its position in the Periodic Table and answer the
following questions.
(1) Is it a metal or a non-metal ?
(ii) Is it more or less reactive than calcium ?
(iii) What is its valency?
(iv) What will be the formula of its phosphate ?
(v) Is it larger or smaller than caesium (Cs) in size ?​

Answer 1

Answer:

1. Barium is a metel

2. Barium is more reactive than calcium

3. It's valency is 2

4. The formula of phosphate is PH4

5. Barium is smaller in size than caesium

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