Which group in the periodic table contains elements that exist in all three states of matter at room temperature? Mention the members of this group along with their atomic numbers and physical states at room temperature for their molecules.

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Solution

The group in the periodic table that contains elements that exist in all three forms of matter that is solid, liquid and gas is the halogen series (Group 17) of elements.
Members of the halogen series
Fluorine (F)
Atomic number: 9
State at room temperature: Gas
Chlorine (Cl)
Atomic number: 17
State at room temperature: Gas
Bromine (Br)
Atomic number: 35
State at room temperature: Liquid
Iodine (I)
Atomic number: 53
State at room temperature: Solid
Astatine (As)
Atomic number: 85
State at room temperature: Solid

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