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The mass number is the sum of protons and neutrons in the atomic nucleus of chemical elements. All mass numbers are integers.
The atomic weight is not an an integer because is calculated taking in the account the isotopic composition of an element; also the mass excess has a role.
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Ezra
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SteveThe Atomic Mass number of oxygen has a decimal value because it accounts for the presence of different isotopes of oxygen in nature. Oxygen has three naturally occurring isotopes: oxygen-16, oxygen-17, and oxygen-18, each with a different mass. The atomic mass number is a weighted average of the masses of these isotopes, leading to a decimal value.
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What is the atomic mass of o?
The atomic mass of oxygen (O) is approximately 16 atomic mass units.
If the atomic mass of oxygen?
Oxygen is a metal element. Atomic mass of it is 16.
What is the atomic mass of Hydrogen Nitrogen and oxygen?
The atomic mass of hydrogen is approximately 1 atomic mass unit, the atomic mass of nitrogen is approximately 14 atomic mass units, and the atomic mass of oxygen is approximately 16 atomic mass units.
What is the approximate mass of an oxygen atom in atomic mass units?
The approximate mass of an oxygen atom in atomic mass units is 16. Oxygen has an atomic number of 8, which means that its atomic mass is approximately 16 atomic mass units.
Rounded off atomic mass of oxygen?
The rounded atomic mass of oxygen is 16.00 amu (atomic mass units).
