Manganese is a transition metal. Consider the isotope: Mn-53. How many protons are in an atom of Mn-53 if the atom has a charge of 5?

25

Explanation:

Isotopes of an element are the same element with different mass numbers but the same atomic number or the number of protons.

we know that in a balanced atom

Number of electrons = Number of protons = Atomic number

Atomic number (z) of manganese = 25

For Mn+5, the number of protons remains the same = 25

However, the number of electrons on Mn+5 = 21

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer