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VikaD [51]
3 years ago
12

the atomic number of cesium (Cs) is 55. If an atom of cesium has 78 neutrons, what is the atomic mass of cesium?

Physics
2 answers:
Slav-nsk [51]3 years ago
7 0
Atomic mass= number of protons + number of neutrons
55 + 78 = 133
hope this helps
Lilit [14]3 years ago
6 0

Answer:

133

Explanation:

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