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Chapter 2: Problem 11

What is the mass number of an iron atom that has 28 neutrons?

Short Answer

Expert verified
The mass number of an iron atom that has 28 neutrons is 54.

Step by step solution

01

Identifying the Number of Protons in an Iron Atom

Always remember atomic number of a particular element represents the number of protons. For iron, it is known that atomic number is 26. Hence, the iron atom would contain 26 protons.
02

Calculating the Mass Number

Mass number of an atom is the sum of the protons and neutrons. In this case, to calculate the mass number of the given iron atom, add the number of protons to the number of neutrons. Hence, the mass number is calculated as follows: mass number = number of protons + number of neutrons = 26 protons (as identified in Step 1) + 28 neutrons.

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