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.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.