Question

which element do you expect to have the
smallest atomic radius. a)Sc b)Zn c)Fe d) Co​

Answer 1

Answer:

it is scandium

Explanation:

atomic number of scandium is 21 while others have larger atomic number than scandium, thus scandium will have smallest atomic radius

Answer 2

Option 'B' is correct. Zinc (Zn) would have the smallest atomic radius, because of the following reasons:-

• The 3-d series of the D-block contains elements from Scandium (21) to Zinc (30).
• The atomic radii are inversely proportional to the atomic size of the elements.
• So, as the atomic size increases along the period the atomic radii decreases.
• This decrease in the radius with the increase in the atomic number leads to an increase in density along the period.
• Therefore, Sc will have the largest atomic radius in the 3-d series.
• Zn<Co<Fe<Sn is the correct order of the increasing atomic radii.

Hence, Option 'B' is correct. Zinc (Zn) would have the smallest atomic radius.

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