Question

4
select the correct answer.
mercury is in the 80th position in the periodic table. how many protons does it have?
a. 8
b. 40
c. 80
d. 160

Explanation:

In the periodic table, the atomic number (position number) of an element is equal to the number of protons in its atom. Since mercury is in the 80th position, its atomic number is 80. So, the number of protons in mercury is 80.

Answer:

C. 80