Question

A particular isotope of plutonium has 94 protons, ____
neutrons, and a mass number of 241.

Answer 1

A particular isotope of plutonium has 94 protons, 147 neutrons, and a mass number of 241.

Explanation:

An atom is identified by two numbers:

• Atomic number: it is equal to the number of protons contained in the nucleus. It is indicated with the letter Z
• Mass number: it is equal to the sum of protons and neutrons in the nucleus. It is indicated with the letter A

Mathematically, this can be rewritten as

$Z=p$

$A=p+n$

where

p is the number of protons

n is the number of neutrons

For the isotope of plutonium in this problem, we have

$Z=p=94$, since it has 94 protons

$A=p+n=241$ (mass number)

From the second equation we get

$n=241-p$

And substituting $p=94$, we find the number of neutrons:

$n=241-94=147$

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Answer 2

Answer:

92, 147, 227

Explanation:

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