Question

Arrange in order of atomic and ionic radii a Ni, Cu, Zn

Answer 1

Atomic and ionic radii of the given elements in decreasing order is Ni > Cu > Zn.

Explanation:

It is known that when we move across a period then there occurs a decrease in atomic size of the elements. This is because due to the increase in number of protons along the period an attractive force acts over the electrons which pulls it closer to the nucleus of the atom.

Therefore, size of the atoms tend to decrease. As Ni, Cu and Zn are all period 4 elements and as Zn being the last element has the smaller size.

Hence, atomic and ionic radii of the given elements in decreasing order is as follows.

                          Ni > Cu > Zn

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