The electronic configurations of four particles A, B, C and D given below:

A 2, 8, 8

B 2, 8, 2

C 2, 6

D 2, 8

Which electronic configuration represents:
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion
(iv) chloride ion?

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Solution

(i) Electronic configuration of particle B represents magnesium atom because its atomic number is 12.

(ii) Electronic configuration of particle C represents oxygen atom because its atomic number is 8.

(iii) Electronic configuration of particle D represents sodium ion. Atomic number of sodium is 11 and it loses one electron to stabilise and forms sodium ion containing 10 electrons.

(iv) Electronic configuration of particle A represents chloride ion. Atomic number of Chlorine is 17 and it gains one electron to stabilise and forms chloride ion containing 18 electrons.

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The electronic configurations of four particles A, B, C and D are given below:
$\begin{matrix} A & 2, 8, 8 B & 2, 8, 2 C & 2, 6 D & 2, 8 \end{matrix}$
(i) magniesium atom? (i) oxygen atom?
(iii) sodium ion? (iv) chloride ion?

Q. The correct electronic configuration of a chloride ion is :

(a) 2, 8

(b) 2, 8, 4

(d) 2, 8, 7

Q. (a) Give the electronic configurations of sodium and chlorine.
(b) Write the electron-dot structures for sodium and chlorine atoms.
(c) Describe the formation of sodium chloride from sodium and chlorine by the transfer of electrons. What changes take place in the electronic configurations of sodium and chlorine during the formation of sodium chloride?
(d) Write any two properties of ionic compounds.

Q. During the formation of magnesium chloride, magnesium atom loses ______ electrons to attain the stable electronic configuration.

Q. The electronic configuration of chloride ion is:

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The electronic configurations of four particles A, B, C and D given below: A 2, 8, 8 B 2, 8, 2 C 2, 6 D 2, 8 Which electronic configuration represents: (i) magnesium atom? (ii) oxygen atom? (iii) sodium ion (iv) chloride ion?

The electronic configurations of four particles A, B, C and D given below:

A 2, 8, 8

B 2, 8, 2

C 2, 6

D 2, 8

Which electronic configuration represents:
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion
(iv) chloride ion?