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Periodic Classification of Elements
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Which element has
$(a)$ two shells, both of which are completely filled with electrons?
$(b)$ the electronic configuration $2,\,8,\,2 ?$
Option A
Option B
Option C
Option D
Solution
$(a)$ Neon has two shells, both of which are completely filled with electrons $( 2$ electrons in $K$ shell and $8$ electrons in $L$ shell $)$.
$(b)$ Magnesium has the electronic configuration $2,\,8,\,2$.
Standard 10
Science
Similar Questions
The position of three elements $A$, $B$ and $C$ in the Periodic Table are shown below
| Group $16$ | Group $17$ |
| – | – |
| – | $A$ |
| – | – |
| $B$ | $C$ |
$ (a)$ State whether $A$ is a metal or non-metal.
$(b)$ State whether $C$ is more reactive or less reactive than $A$.
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