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# Why are atomic masses rounded?

Updated: 8/10/2023

Wiki User

10y ago

Sometimes the Atomic Mass is listed as the average mass of the isotopes and contains a decimal. But since you can't have a fractional part of a proton or a neutron without creating a big mess, it is necessary to round to the nearest whole number. Subtracting the atomic number from the rounded atomic mass will give you the number of neutrons.

Wiki User

7y ago

Wiki User

15y ago

The atomic mass of a neutron is one, therefore it is not rounded up or down.

Wiki User

8y ago

This is because what you are looking for is a count of neutrons and a count must be a whole number.

Pierre Rivet

Lvl 2
2y ago

pfffff havent got a scooby doo

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Q: Why are atomic masses rounded?
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Electrons

### Which statement best explains why most atomic masses on the periodric table are decimal numbers?

Atomic masses are a weighted average of the naturally occurring isotopes.

### When masses combine to form elements with larger masses?

Atomic fusion occurs when masses combine to form elements with larger mass.

### Is atomic masses measured in amus?

Yes it is true.

Related questions

### How do atomic numbers and atomic masses increase in the periodic table?

The atomic number and atomic masses increase as you move from left to right.

### By adding the atomic masses?

You will get the atomic bomb!

### How were the atomic number and the atomic masses of the elements determined?

Atomic masses are determined by mass spectrometry. The atomic number is identic with the number of protons in the atom - depends on position in the periodic table.

### What is the atomic number krypton rounded?

krypton's atomic number is rounded to 84

Electrons

### The average atomic mass of an element is the average of the atomic masses of its?

The average atomic mass of an element is the average of the atomic masses of its isotopes (that is a weighted average). You have to take into account the abundance of each isotope when they do your averaging.

### How are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on peridoic table?

Elements are arranged in a periodic table by atomic number, lower on top and left. Atomic masses have no direct relationship to the arrangement of atoms, although generally atoms with higher atomic numbers will have higher atomic masses. (There are at least three exceptions for atoms with atomic numbers differing by 1.)

### Which Russian scientist related chemical properties and atomic masses?

Dmitri mendeleev related the chemical properties and atomic masses around 1860

### What did Dimitri Mendeleeve do?

Dmitri arranged the elements in order of increasing atomic masses. He arranged elements in rows and columns according to atomic masses.

Isotopes

### What atoms with same atomic number but different atomic masses?

Isotopes of the same element have the same number of protons (atomic number) but differ in number of neutrons (hence atomic masses).

### Why interval notation cannot be used to represent the set of atomic masses given?

Why interval, notation cannot be used to represent instead of atomic masses