Respuesta :
Answer:
The atom has 5 protons.
Explanation:
The atomic number indicates the number of protons.
Atomic number = Number of protons
The atom having 5 as the atomic number, and 11 has the mass number have 5 protons. Thus, option A is correct.
What is mass number?
In an atom, the nuclei consists of protons and neutrons. The sum of the protons and neutrons in an atomic nuclei determines its mass number.
The atomic number of an atom is the number of protons in an atom. Thus, the number of protons in an atom in 5. Hence, option A is correct.
Learn more about mass number, here:
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