Question

which pair of elements is chemically similar. (a)K , Cr (b)Cu , Ca (c)F , Cl (d)N , O​

Answer 1

Answer:

hope it help you

Explanation:

(c) F,Cl because they belong to same group(halogens) and also have same physical and chemical properties.they have to get one electron to complete their octet .

Answer 2

F and Cl are chemically similar

Explanation:

Elements present in same group have same number of valence electrons and it is the valence electrons that determine the chemical reactivity of an element.

Each of them contains 7 valence electrons and hence, all of them needs to gain one electron each in order to complete their octet, respectively.

Hence, we can conclude that elements in the same group of the periodic table have similar properties because they have same number of valence electrons.

Only Florine (F) and chlorine belong to same group and thus are chemically similar.

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