Question

Write down the electronic configuration of Mg2+ ion. how to find it.????? please help... me.....​

Answer 1

Answer:

we can write it as

2,8 or

1s^2 2s^2 2p^6

Explanation:

mg has atomic no. -12, but mg2+ ion has only 10 electrons in its outermost shell

Answer 2

$\textsf{\large{\underline{\underline{Electronic Configuration of Mg ^{\textsf{\large{2+ }}} ion}}}}$

$\text{ \small{Atomic Number of Magnesium[Mg] is 12 }} \\ \\ \textsf { \small { \underline{Atomic Number of \: Mg ^{\textsf{2+ }} is 10}}}$

As we know, [Atomic Number = Number of electrons]

In ${\textbf{Mg}} ^{\textbf{2+}}$, 2 electrons is removed that means Number of electrons is 10 & Number of protons is 12 (Number of electrons is 2 less) that's why it has 2+ charges.

$\textsf{Electronic Configuration of Mg ^{\textsf{2+ }} ion is :–}$

$\bold{{\textsf{1s}}^{2} , \: { \textsf{2s}}^{2} , \: { \textsf{2p}}^{6} }$

$\textbf{\underline{\underline{ \: \: Explanation \: \: }}}$

When an element is written as ${\text{Mg} } ^{2+}$, it means that it is losing 2 electrons. This is because electrons have a negative charge, and since it is written as a positive number, it means that instead of gaining electrons and moving to the right, it is going to lose electrons and move to the left.