Correct option is A
The correct answer is:(A) 17th
Information Booster:
16th : Group 16 contains the chalcogens, including oxygen (O) and sulfur (S), which are not halogens.
- Halogens are a group of nonmetals that include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
- These elements are located in Group 17 of the modern periodic table.
- Halogens are highly reactive due to their tendency to gain one electron to complete their octet configuration.
- They form salts when they react with metals, such as sodium chloride (NaCl).
18th : Group 18 contains thenoble gases, which are inert due to their stable electronic configurations.
1st: Group 1 contains thealkali metals, such as sodium (Na) and potassium (K), which are metals, not halogens.
Key Points:
- Halogens are in Group 17 of the periodic table.
- They are highly reactive nonmetals with 7 valence electrons.
- They are known for forming salts and diatomic molecules (e.g., Cl₂, F₂).
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