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Solution - Position of Elements and Trends in the Modern Periodic Table

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ConceptPosition of Elements and Trends in the Modern Periodic Table  

Question

The position of eight elements in the Modern Periodic Table is given below where atomic numbers of elements are given in the parenthesis.

Period No.

2Li(3)Be(4)
3Na(11)Mg(12)
4K(19)Ca(20)
5Rb(37)Sr(38)

(i) Write the electronic configuration of Ca.

(ii) Predict the number of valence electrons in Rb.

(iii) What is the number of shells in Sr?

(iv) Predict whether K is a metal or a non – metal.

(v) Which one of these elements has the largest atom in size?

(vi) Arrange Be, Ca, Mg and Rb in the increasing order of the size of their respective atoms.

Solution

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Reference Material

Solution for concept: Position of Elements and Trends in the Modern Periodic Table. For the course CBSE
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