14
Explanation:
The number of neutrons in one atom of silicon with an isotopic mass number of 28amu is 14.
An atom is made up three fundamental sub-atomic particles which are:
Protons, neutron and electrons
Protons are the positively charged particles in an atom
Neutrons do not carry any charges
Electrons are the negatively charged particles.
In the nucleus of an atom, both protons and neutrons can be found. They are the massive particle in an atom.
The mass number of an atom = number of protons + number of neutrons
Number of neutrons = mass number - number of protons.
From the periodic table, we know that silicon has an atomic number of 14.
The atomic number is the number of protons in an atom:
Number of neutrons = 28 - 14 = 14amu
In the atom, we will have 14amu of neutrons in a silicon atom.
learn more:
Number of neutrons brainly.com/question/2757829
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