Answer: Manganese element has 25 protons.
Explanation:
Atomic number is defined as the number of protons or number of electrons that are present in an atom. It is represented as 'Z'
Z = Atomic number = Number of protons = Number of electrons
For the given options:
Option 1: Magnesium (Mg)
This element has an atomic number of 12, thus it will have 12 protons.
Option 2: Aluminium (Al)
This element has an atomic number of 13, thus it will have 13 protons.
Option 3: Tin (Sn)
This element has an atomic number of 50, thus it will have 50 protons.
Option 4: Manganese (Mn)
This element has an atomic number of 25, thus it will have 25 protons.
Hence, manganese element has 25 protons.
