An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11.How many electrons does boron have?

Question

Quizplus · Accepted Answer

The atomic number of boron (5) tells us that it has 5 protons in its nucleus, and since it is an uncharged atom it must also have 5 electrons to balance out the positive charge of the protons. The atomic mass of 11 tells us that it has a total of 11 particles in its nucleus (protons and neutrons combined).

An Uncharged Atom of Boron Has an Atomic Number of 5