Question

An element x has 2 electron in its M shell . It forms bond with an element y which has 7 electron in its third orbit
a . Write the formula of the compound formed
b. Which nearest inert gas electronic configuration will element X and Y acquire

Answer 1

Answer:

(i) The formula of chemical compound is $\mathbf{M g C l}_{2}$

(ii) The ‘nearest inert gas’ electronic configuration for element “X” is 2,8.

• The nearest inert gas electronic configuration for element “Y” is 2,8,8.
• The given element “X” has two electrons in its “M” shell.
• Therefore, the electronic configuration “X” element is  2,8,2.
• Total no. of electrons are 12 therefore, element is magnesium.
• The given element “Y” has totally ‘seven electrons’ in its “M” shell.
• Therefore, the electronic configuration “X” element is  2,8,7.
• Total no. of electrons are 17 therefore, element is chlorine.

Therefore, orbital diagram, which shows the ‘formation of the compound’ between X and Y is magnesium chloride.