Question

4
what is the atomic number of the element? * (1 point)
80
121
201
281

Explanation:

To determine the atomic number, we recall that the atomic number of an element is the number of protons in its nucleus, and it is a unique identifier for each element. However, since the specific element isn't named, but looking at the options, the atomic number of Mercury (Hg) is 80, which is a known element's atomic number. The other options (121, 201, 281) do not correspond to the atomic numbers of any naturally occurring or well - known elements in the standard periodic table.

Answer:

A. 80