| Element | Electronic configuration |
| (p) Potassium | (a) 2, 5 |
| (q) Nitrogen | (b) 2, 8, 8, 1 |
| (r) Chlorine | (c) 2, 8, 7 |
Answer:
Therefore, the right match is p - 2, q - 1, r ? 3
Element
Z
Electronic Configuration
K
L
M
N
Potassium
19
2
8
8
1
Nitrogen
7
2
5
Chlorine
17
2
8
7
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