Question

which one of the following charged ions will be formed by an element of group II A having electronic configuration 1s2 2s2 2p6 3s2​

Answer 1

A charge of 2⁺ will be formed by an element of group II A having electronic configuration 1s², 2s² 2p⁶, 3s².

• The element being referred to here is Magnesium(Mg).
• Being a highly reactive alkaline earth metal, naturally, the free metal can't be found as it reacts with oxygen to form magnesium oxide(MgO).
• Magnesium being metal has a very low ionization potential, i.e., its outer two electrons are very loosely bound to the nucleus and not much energy is required to excite the electrons so that they leave their orbits.
• As to form an octet stable configuration, it gives away its two valence electrons thereby gaining a charge of 2⁺.

Answer 2

Answer:

A+

Explanation: