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Atomic Structure and Chemical Bonding — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYAtomic Structure and Chemical Bonding5 Marks
Question
An element $X$ has $2$ electrons in its $M$ shell, it forms a bond with an element $Y$ which has $7$ electrons in its third orbit.
  1. Write the formula of the compound formed.
  2. Which nearest inert gas electronic configuration will element $X$ and $Y$ acquire.
  3. Show by orbital diagram the formation of the compound between $X$ and $Y.$
✓

Answer

Element $X$ has $2$ electrons in its M shell.The electronic configuration would be $2, 8, 2$.So, element X is Mg ($12$).Element Y has $7$ electrons in its third orbit.The electronic configuration would be $2, 8, 7$.So, element $Y$ is $Cl (17)$.
  1. $MgCl_2$
  2. The nearest inert gas electronic configuration for element $X$ is $2,8$, while that for element $Y$ is $2,8,8.$
  3. Orbital diagram showing the formation of the compound between $X$ and $Y:$
Magnesium chloride:

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