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Question : 9
Total: 36
Calcium is an element with atomic number
20. Stating reason answer each of the following questions :
(i) Is calcium a metal or non-metal ?
(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19 ?
(iii) Write the formula of its oxide.
20. Stating reason answer each of the following questions :
(i) Is calcium a metal or non-metal ?
(ii) Will its atomic radius be larger or smaller than that of potassium with atomic number 19 ?
(iii) Write the formula of its oxide.
Solution:
(i) Calcium is a metal, since it looses electrons.
(ii) Radius of calcium is smaller than potassium as atomic size decreases in a period.
(iii)CaO
(ii) Radius of calcium is smaller than potassium as atomic size decreases in a period.
(iii)
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