Calcium is an element with atomic number 20.
(i) Is it a metal or non-metal?
(ii) Is it more reactive than Mg or less?
(iii) What will be its valency?
(iv) What will be the formula of its Chloride?
(v) Will it be larger than K or smaller?
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Answer:
(a) calcium is a metal
(b) yes, it is more reactive than Mg
(c) it's valency is 2
(d) Ca+Cl2= CaCl
(e) K will be larger
Answered by
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Calcium
Explanation:
(i) Calcium is a metal as metallic character decreases as we move from left to right in a period. Calcium is located at the left of the period.
(ii) Calcium is more reactive than Mg. Reactivity increases as we move down a group. Ca is below Pg in a group.
(iii) Valency of Ca is 2.
(iv) Calcium chloride will be CaCl.
(v) Calcium will be smaller than Potassium (K). Atomic size decreases as we move from left to right in a period. K is at the right of Ca.
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