Q. 195.0( 3 Votes )
The electronic configuration of a magnesium atom is 2, 8, 2 and that of a chlorine atom is 2, 8, 7. State the type of bond formed between the two and the formula of the compound formed. Show its formation with the help of electron-dot structure. Also list its two properties.
i. The electronic configuration of a magnesium atom is 2, 8, 2. Hence, Mg will loose its two valence electrons to complete its octet. This results in the formation of Mg2+ion.
ii. The electronic configuration of a chlorine atom is 2, 8, 7. Hence, Cl will gain one electron to complete its octet. This results in the formation of Cl- ion.
iii. Mg2+ is donating 2 electrons to each chlorine atoms (two chlorine atoms)
iv. As you can see that in the formation of the bond, the ions (Mg2+ and Cl-) are involved Hence, the type of bond is an ionic bond.
Properties of magnesium chloride (MgCl2):
i. It is water soluble.
ii. It is a good conductor of electricity.
iii. It has a high melting and boiling point.
iv. It is generally brittle.
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