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!
Free related questions
28th October 2016,
12:01 PM
13th November 2016,
6:11 PM
23rd December 2016,
1:28 PM
2nd January 2017,
12:24 PM
15th February 2017,
10:44 AM
RELATED STUDY RESOURCES :
Browse free questions and answers by Chapters
Trending Tags
Latest Questions
CBSE X Mathematics
Asked by jaiacharya18
18th February 2019,
1:35 AM
CBSE XI Commerce Statistics for Economics
Asked by scarlett.audrey1330
18th February 2019,
12:35 AM
CBSE XII Science Physics
Asked by Faaiza
17th February 2019,
11:30 PM
