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- Solve! The elements X, Y, Z and J have the indicated electron configurations starting with the innermostshell. The most metallic element is:
The elements X, Y, Z and J have the indicated electron configurations starting with the innermost shell. The most metallic element is:
- Option 1)
X = 2,8,3
- Option 2)
Y=2,8,8
- Option 3)
Z= 2, 8, 8, 1
- Option 4)
J = 2, 8, 8, 7
Answers (2)
As we learned in concept
Metals -
– Form metallic bonds.
– 78% of all known elements.
– good conductor of heat & electricity.
– Malleable and ductile.
-
When we look at electronic config of these elements, we find that Y is a noble gas and J is a halogen (non metal). Between X to Z, Zis an alkali metal an also it is lower down the group than X and metallic character increases down the group. Also, Z has to lose just one electron for noble gas config whereas X has to lose 3 which is harder.
Option 1)
X = 2,8,3
This option is incorrect.
Option 2)
Y=2,8,8
This option is incorrect.
Option 3)
Z= 2, 8, 8, 1
This option is correct.
Option 4)
J = 2, 8, 8, 7
This option is incorrect.
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