Question

The atomic number of boron is 5. what does this tell you about an atom of boron?

Answer 1

It has 5 atoms and the amount of protons and electrons it has.

Answer 2

Boron is 5 in the periodic table of elements and the mass is rounded up 10 11. If the atomic number of boron is 5, that means that there would be 5 protons and 5 electrons.