How to calculate relative atomic mass of Hydrogen?
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Relative atomic mass equals the mass of an atom of an element (here, Hydrogen) divided by one-twelfth mass of an atom of C-12.
One twelfth mass of C-12 is nothing but 1/12 of its mass number (12) = 1.
And the mass of an atom of Hydrogen = 1.6736x10^-24 g.
Relative atomic mass would then ve equal to the mass of an atom of hydrogen itself since the denominator is 1. i.e. = 1.67X10^-24 g.
In terms of amu,
1 amu = 1.66x10^-24g,
the mass would be
1.6736x10^-24g/1.66x10^-24g = 1.0078 amu = 1.0080 amu.
One twelfth mass of C-12 is nothing but 1/12 of its mass number (12) = 1.
And the mass of an atom of Hydrogen = 1.6736x10^-24 g.
Relative atomic mass would then ve equal to the mass of an atom of hydrogen itself since the denominator is 1. i.e. = 1.67X10^-24 g.
In terms of amu,
1 amu = 1.66x10^-24g,
the mass would be
1.6736x10^-24g/1.66x10^-24g = 1.0078 amu = 1.0080 amu.
tawaseem:
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Answered by
7
Answer:
Find the relative mass of any atom by adding the number of protons to the number of neutrons. Hydrogen has a relative atomic mass of 1, and carbon-12 has a relative atomic mass of 12. Isotopes of the same element have different numbers of neutrons, so you need to calculate for one specific isotope.
Hydrogen/Atomic mass
1.00784 u
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