Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
8104911739
For Business Enquiry

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

The atomic number of an element 'X' is 20.Write (a)its valency (b)whether it is a metal or a non-metal, (c)the formula of compound formed when the element 'X' reacts with an element 'Y' of atomic number 8. Justify your answer in each case

Asked by 28th March 2013, 7:18 PM
Answered by Expert
Answer:
The element with atomic number 20, has electronic configuration   1s2 ,2s2 ,2p6,3s2 ,3p6,4s2.
So, its valency will be 2. As there are two electrons in the outermost shell, it can loose them and attain argon configuration.
It is a metal. As it can loose electrons easily.
 
Y has atomic number 8, so electronic configuration will be  1s2 ,2s2 ,2p4. So, it needs two more electrons to fulfill the octet. The valency of Y is two.
 
As the valency ofsboth the element is 2, they will form the compound XY on reaction.
 


Answered by Expert 31st March 2013, 6:29 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp