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. |
Answer:
(i) Calcium is a metal, since it looses electrons. (ii) Radius of calcium is smaller than potassium as atomic size decrease in a period. (iii) CaO.
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