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An element x placed and second …

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An element x placed and second group of and fourth period burns in the prense of oxygen from a basic oxide Identify the Element x Write it electronic CONFRigaztin Write a valance equation for the reaction when is oxide is dissolved in water

Posted by Vijay Sharma 6 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Yash Sharma 6 years, 3 months ago

The X element is calcium. Because, no. Of period - 4 So, no. Shell -4 •.• no. Of periods - 2 So, no. Of valence electron - 2 Since, it lies in 2nd period so it is Alkaline earth metal. Atomic no. - 20 Electronic Configuration - 2,8,8,2 Reaction of calcium oxide with water. 2CaO + 2H2O -------- Ca(OH)2 +H2 + heat

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CBSE > Class 10 > Science