An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope's mass number? 23 54 77 131

Question

Asa Gordon

Chemistry

25 July, 16:59

An isotope of xenon has an atomic number of 54 and contains 77 neutrons. What is the xenon isotope's mass number? 23 54 77 131

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Answers (1)

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Reece Jacobs · Answer 1

Lets get this organized:-

Atomic number ⇔ Protons

54 ⇔ 54 protons

Atomic mass ⇒ Protons + Neutrons

? ⇒ 54 + 77

54 + 77 = 131

The atomic mass would equal →→→ 131

So, our final answer would be 131