CBSE Class 10 Science 2017 Outside Delhi Term II Set 1 Paper

Question : 8 of 12

Marks: +1, -0

Write the electronic configuration of two elements

X

and

Y

whose atomic numbers are 20 and 17 respectively. Write the molecular formula of the compound formed when element

X

reacts with element

Y

. Draw electron-dot structure of the product and also state the nature of the bond formed between both the elements

Solution:

X=20 ; 2,8,8,2

Y=17 ; 2,8,7

The nature of bond will be ionic.

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