An atom of boron has an atomic number of 5 and an atomic mass of 11. the atom contains
5 protons, 6 electrons, and 5 neutrons.
11 protons, 11 electrons, and 5 neutrons.
5 protons, 5 electrons, and 6 neutrons.
11 protons, 6 electrons, and 6 neutrons.

It is C.

Explanation:

The atomic mass = number  of protons + number of neutrons

= 5 + 6 = 11. The number of protons = the number of electrons.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being