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cestrela7 [59]
3 years ago
15

An ____,or an element located in group 7A, will form a salt when reacted with a metal atom.

Chemistry
1 answer:
stiv31 [10]3 years ago
5 0

Answer:

B. Halogen

Explanation:

Halogens are the family of chemical elements found in the group VIIA of the periodic table which means they possess seven (7) outer electrons. Some examples of halogens are Fluorine (F), Iodine (I), Bromine (Br), and Chlorine (Cl).

A halogen, or an element located in group 7A, will form a salt when reacted with a metal atom.

For example, when Chlorine reacts with Sodium it would form a salt known as Sodium Chloride.

Na + Cl ----> NaCl

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3 years ago
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Answer:- O_2+2H_2\rightarrow 2H_2O and 2Al+6HI\rightarrow 2All_3+3H_2

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Second reaction is a double displacement reaction so there is no change to the oxidation numbers of the elements and hence it is not oxidation-reduction reaction.

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fourth and fifth reactions are again double displacement reactions and so there is no change to oxidation numbers for any of the elements and they are not the oxidation-reduction reactions.

So, the only correct equations are O_2+2H_2\rightarrow 2H_2O and 2Al+6HI\rightarrow 2All_3+3H_2 .

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3 years ago
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Hope it will help :)❤

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