An atom of boron has an atomic number of 5 and an atomic mass of 11. The atom contains:. . A. 5 protons, 6 electrons, and 5 neutrons.. . B. 11 protons, 11 electrons, and 5 neutrons.. . C. 5 protons, 5 electrons, and 6 neutrons.. . D. 11 protons, 6 electrons, and 6 neutrons.
The atomic number of an element is the number of protons present. Its mass number is the sum of the number of protons and neutrons. The number of electrons in the atom of this element is equal to that of protons if it is not charged. From the given, the answer for this item is letter C. 5 protons, 5 electrons, and 6 neutrons.
