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Why are the elements fluorine (F), chlorine (Cl), and bromine (Br) all found in the same group within the periodic table?
They all exist as gases at room temperature.
They all react with the noble gases.
They have similar chemical properties.
They are all non-metals that form 1+ ions.

Respuesta :

gracekelly22
D. Chlorine, bromine, and fluorine are all non metals.

Answer: The correct answer is they have similar chemical properties.

Explanation:

We are given three elements which are: Fluorine (F), Chlorine (Cl) and Bromine (Br).

All these elements belong to same group which is Group 17.

Fluorine element exist as gas, Chlorine element exist as gas and Bromine element exist as liquid.

The electronic configurations of these elements are:

Fluorine (F): [tex][He]2s^22p^5[/tex]

Chlorine (Cl): [tex][Ne]3s^23p^5[/tex]

Bromine (Br): [tex][Ar]4s^24p^5[/tex]

All the three elements have 7 valence electrons and the elements having same number of valence electrons will show similar chemical properties and thus, they belong to the same group.

Hence, the correct answer is they have similar chemical properties.

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