CBSE Class 9 Answered
(a) Explain the difference between an atom and an ion. Write the electronic configuration of atom and positive ion of 2311X.
(b) Write the compound formed when ion of element 'X' combines with carbonate ion.
Asked by Topperlearning User | 30 Mar, 2016, 09:34: AM
Expert Answer
(a) In atom ,
No. of protons = No. of electrons = atomic no.
In ion,
No. of protons = No. of electrons
In X atom,
Atomic no. = 11 so, electronic configuration = 2, 8, 1
In X+ ion,
Atomic no. = 10 so, electronic configuration = 2, 8
(b) X has a valency of +1 and carbonate ion has valency 2.
The formula is X2CO3
Answered by | 30 Mar, 2016, 11:34: AM
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