An atom of iron has an atomic number of 26.Which of the following is TRUE?

Question

Quizplus · Accepted Answer

The atomic number of an element determines the number of protons in its nucleus. Therefore, since iron has an atomic number of 26, it must have 26 protons. The number of electrons in an atom is equal to the number of protons in a neutral atom, so iron must also have 26 electrons. Choice A is incorrect because it states that iron has only 13 electrons, which is incorrect. Choice B is incorrect because it states that iron has only 13 protons, which is also incorrect. Choice C is incorrect because it states that iron has 13 protons and 13 neutrons, which does not add up to the correct atomic number of 26.

An Atom of Iron Has an Atomic Number of 26