From the options provided for each element below, choose the properties that it may have based on its location in the periodic table. nickel (ni):
a.) forms colorful compounds
b.) reactive metal
c.)gas

answer is: option a

The correct answer is option A.

Explanation:

Ni is metal with atomic number of 28 and is member of 3-d series in a periodic table. Also known as transition elements which shows variable oxidation state and due to this reason they from colorful compounds.

So, from the given options , the correct answer option A.

Answer : The correct option is, (A) forms colorful compounds.

Explanation :

As we know that nickel (Ni) is transition metal with atomic number 28 and it is belong to the 3-d series in a periodic table.

The electronic configuration of 'Ni' is :

It is a transition elements that has ability to shows variable oxidation state and due to variable oxidation state they forms colorful compounds.

Hence, the correct option is, (A) forms colorful compounds.