Taking into account the definition of mass number, the atomic number of the atom is 13.
First of all, all atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them.
On the other hand, the mass number tells us the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
In this case, you know that:
- Mass number= 27
- Number of neutrons= 14
Replacing in the definition of mass number:
27= number of protons + 14
Solving:
number of protons= 27 - 14
number of protons= 13
The atomic number indicates the total number of protons in the nucleus of a given atom and is represented by the letter Z.
In summary, the atomic number of the atom is 13.
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