A) irregularly changes from left to right across the third row
B) increases from left to right across the third row
C) decrease for\[Na\]to\[Ar\]
D) remains constant
Correct Answer: A
Solution :
In the third row?s elements, the value of ionisation potential increases from left to right with breaks, where the atoms have somewhat stable configuration.| Third row?s element | Na | Mg | Al | Si | P | S | Cl | Ar |
| IP (in eV) | 5.1 | 7.6 | 6.0 | 8.0 | 11.0 | 10.4 | 13.0 | 15.8 |
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