Respuesta :

Answer:

The atomic number is 5.

Explanation:

There are 5 protons in the nucleus, so the atomic number is 5. The atomic number always equals the number of protons in the nucleus.

jadediviccaro00158

Answer:

the atomic number is 5 (Boron)

Explanation:

The atomic number always equals the number of protons in the nucleus (they have a positive charge). Since there are 5 protons in the diagram, the atomic number is 5.