Given that iron has 26 protons, 26 electrons, 30 neutrons, and an atomic weight of 55.845 amu, what is its atomic number?
26
55.845
30
52
Detailed Explanation
The atomic number of an element is the number of protons found in its nucleus. In the case of iron, that number is 26.
Take more free practice tests for other ASVAB topics with our ASVAB prep now!