How many of the following elements have 2 unpaired electrons in the ground state? c, o, ti, si a) 1 b) 3 c) 4 d) 2

Option (c) is the correct answer.

Explanation:

Atomic number of carbon is 6 and its electronic configuration is .

Atomic number of oxygen is 8 and its electronic configuration is .

Atomic number of titanium is 2 and its electronic configuration is .

Atomic number of silicon is 14 and its electronic configuration is .

Therefore, we can conclude that out of the given options all the 4 elements have 2 unpaired electrons in the ground state.

indium, and thallium have three electrons i think