Question

which of the following has smallest radii 1. Mn+2 2. Ni+2 3. Ti+2 4. V+2​

Answer 1

Answer:

Ni+2

Explanation:

for 3d series order for at. radius :-

Sc > Ti > V> Cr> Mn> Fe = Co = Ni < Cu< Zn

Answer 2

• In a period it is defined that from  left to right the atomic size decreases and the effective nuclear charge increases.
• As for in the 3rd series  ,The located elements are
• Vanadium,manganese,Titanium , Nickel. Zinc, Scandium, chromium, iron,cobalt .
• Their atomic number ranges from 21 to 30.
• The arrangement of elements according to their radii is
• $Ti^{+2} > V^{+2} > Mn^{+2} > Ni^{+2}$
• According to the above order the elements are arranged in an ascending order according to their radii.The ascending order represents the radii will be reduced from first to last element.
• The last element will have the low radii
• Therefore, The element with the smallest radii is nickel
• $Ni^{+2}$
• #spj3