Mercury has an atomic number of 80 and a mass number of 200. How many neutrons are in one atom of mercury?
2 answers:
120 neutrons are present in mercury
Answer:
120 neutrons
Explanation:
Mercury has an atomic number of 80. The atomic number (Z) represents the number of protons. Then,
Z = p⁺ = 80
Mercury has a mass number of 200. The mass number (A) represents the sum of protons and neutrons. Then,
A = p⁺ + n° = 200
We can establish that,
A = Z + n°
n° = A - Z
n° = 200 - 80 = 120
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