Identify the INCORRECT statement regarding the halogens group in the periodic table.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. They have the largest atomic size in their period.
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They are located on the left of the noble gases on the periodic table – Correct
Halogens are in Group 17, just to the left of noble gases (Group 18).
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They are reactive non-metals – Correct
Halogens are among the most reactive non-metals, especially fluorine.
- They form diatomic molecules in their elemental states – Correct
For example, Cl₂, F₂, Br₂ are all diatomic molecules.
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They have the largest atomic size in their period – Incorrect
In a period, atomic size decreases from left to right, so halogens have smaller atomic sizes, while alkali metals (Group 1) have the largest in each period.
'They have the largest atomic size in their period.' – Incorrect.