Which element has
$(a)$ two shells, both of which are completely filled with electrons?
$(b)$ the electronic configuration $2,\,8,\,2 ?$
Which element has
$(a)$ two shells, both of which are completely filled with electrons?
$(b)$ the electronic configuration $2,\,8,\,2 ?$
$(a)$ 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 $2,\,8,\,2$.
Similar Questions
What property do all elements in the same column of the Periodic Table as boron have in common ?
What property do all elements in the same column of the Periodic Table as boron have in common ?
The position of three elements $A$, $B$ and $C$ in the Periodic Table are shown below
Group $16$
Group $17$
-
-
-
$A$
-
-
$B$
$C$
$(a)$ Will $C$ be larger or smaller in size than $B$ ?
$(b) $ Which type of ion, cation or anion, will be formed by element $A$ ?
The position of three elements $A$, $B$ and $C$ in the Periodic Table are shown below
| Group $16$ | Group $17$ |
| - | - |
| - | $A$ |
| - | - |
| $B$ | $C$ |
$(a)$ Will $C$ be larger or smaller in size than $B$ ?
$(b) $ Which type of ion, cation or anion, will be formed by element $A$ ?
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves ? Compare and find out.
Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves ? Compare and find out.
Use Mendeléev’s Periodic Table to predict the formulae for the oxides of the following elements :
$K,\, C,\, Al,\, Si,\, Ba$.
Use Mendeléev’s Periodic Table to predict the formulae for the oxides of the following elements :
$K,\, C,\, Al,\, Si,\, Ba$.
What were the criteria used by Mendeléev in creating his Periodic Table ?
What were the criteria used by Mendeléev in creating his Periodic Table ?