An atom of the element iron has an atomic number of 26 and an atomic weight of 56.If it is neutral,how many protons,neutrons,and electrons does it have?
A)26 protons,30 neutrons,26 electrons
B)26 protons,30 neutrons,30 electrons
C)26 protons,56 neutrons,26 electrons
D)13 protons,43 neutrons,13 electrons
E)13 protons,56 neutrons,13 electrons

Question

Quizplus · Accepted Answer

An element's atomic number gives the number of protons it has, so iron has 26 protons. The atomic weight is the sum of protons and neutrons, so the number of neutrons is 56 - 26 = 30. Since the atom is neutral, the number of electrons is also 26.

An Atom of the Element Iron Has an Atomic Number