Question

An ion of iron has an 26 protons 30 neutrons and 23 electrons. what are its atomic number atomic mass and net charge?

Answer 1

SOLUTION (a) The element whose atoms have 26 protons (atomic number 26) is Fe (iron). The mass number of this isotope is 26 + 30 = 56 (the sum of the protons and neutrons). Because the ion has two more protons than electrons, it has a net charge of 2+. Thus, the complete symbol for the ion is .

Answer 2

Atomic number = 26

Atomic mass = 26 + 30 = 56

Net Charge = 26 - 23 = +3

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