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Variation of Electronegativity

Nitrogen atom...

Question

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why? [3 MARKS]

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Solution

Each point: 1 Mark

1. Nitrogen (7): 2, 5
2. Phosphorus (15): 2, 8, 5
3. Since, electronegativity decreases with moving from top to bottom in a group, thus Nitrogen will be more electronegative.

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Similar questions

The electronic configuration of Phosphorus (atomic number 15) will be:

15

The atomic numbers of three elements A, B and C are given below :

Element Atomic number

A 5

B 7

C 10

(i) Which element belongs to group 18? (ii) Which element belongs to group 15?

(iii) Which element belongs to group 13? (iv) To which, period/periods do these elements belong?

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