32
41
63
80
Answer is Right!
Answer is Wrong!
The correct answer is D. 80.
The atomic number is the number of protons in the nucleus of an atom. It is unique for each element and is used to identify the element on the periodic table. Mercury has an atomic number of 80, which means that it has 80 protons in its nucleus.
Option A is incorrect because 32 is the atomic number of germanium. Option B is incorrect because 41 is the atomic number
of niobium. Option C is incorrect because 63 is the atomic number of europium.