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

54

Chemistry 101

Chapter 2

Atoms, Molecules, and Ions

Atoms, Molecules and Ions

University of Central Florida

Rice University

University of Maryland - University College

Lectures

01:08

What is the mass number of…

02:08

01:24

What is the mass number o…

00:13

01:58

Give the mass number of (a…

01:05

What is the average atomic…

01:22

An isotope of iron, Fe, ha…

00:46

00:45

The most likely mass numbe…

00:26

Calculate the atomic numbe…

How many protons and neutr…

00:40

What is the atomic mass of…

01:07

How many neutrons are pres…

Okay, so the gold. The problem is to determine the mass number for Iran. Given that the Adam has 28 neutrons before we begin, it's important to note that in order to find the mass number, you just need to add the number of protons, plus the number of neutrons. Therefore, in order to solve the problem. Since we already know that the number of neutrons is 28 we need to find the number of protests we can do is by looking at the periodic table of elements in the periodic table. Iron is the 26 element. Therefore, it has 26 protons. Now we have everything to solve the problem. So we know that the number of protons would be 26 given the periodic table. And we're also given that the number of neutrons is 28. Therefore, 26 plus 28 is 54 which would be the mass number of the elopement

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