Question

# On the periodic table of the elements, mercury (Hg) has an atomic number of 80 and a mass number of 200.59. It has seven stable isotopes. The most abundant of these probably have ________. a. about 80 neutrons each b. fewer than 80 neutrons each c. more than 80 neutrons each d. more electrons than neutrons

Solution

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The sum of the atomic number and the number of neutrons, gives the mass number of an atom. Therefore, is the atomic number is 80 and the mass number is 200.59 then subtract the mass number with the atomic number to reveal the number of neutrons which is greater than (80) 120.59.

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