Respuesta :
The atomic mass can be defined as the mass of neutrons and protons in the atom. The atomic mass of the oxygen isotope is 18 amu.
What is an atom?
An atom is the smallest particle comprised of three subatomic units, namely electrons, protons, and neutrons.
The number of electrons in the atoms determines the atomic number, while the number of protons and neutrons determines the atomic mass.
The atomic mass can be given as:
[tex]\rm Atomic\;mass=Neutrons+Protons[/tex]
The oxygen isotope has been comprised of 10 neutrons and 8 protons. The atomic mass of the isotope is given as:
[tex]\rm Atomic \;mass=10+8\;amu\\Atomic\;mass=18\;amu[/tex]
The atomic mass of the oxygen isotope is 18 amu. Thus, option C is correct.
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