${\mathrm{Be}}^{+2} \mathrm{and} {\mathrm{B}}^{+3}$ are isoelectronic, what is difference between the protons of  ${\mathrm{Be}}^{+2} \mathrm{and} {\mathrm{B}}^{+3}$ is ___________

${\mathrm{Be}}^{+2} \mathrm{and} {\mathrm{B}}^{+3}$ are isoelectronic species.

Be(Z=4) & B(Z=5)

Protons difference between${\mathrm{Be}}^{+2} \mathrm{and} {\mathrm{B}}^{+3}$ is 1

${\mathrm{Be}}^{+2}$Contains $2{\mathrm{e}}^{-},4{\mathrm{p}}^{+},5\mathrm{n} \mathrm{and} {\mathrm{B}}^{+3} \mathrm{contains} 2{\mathrm{e}}^{-}, 5{\mathrm{p}}^{+},6\mathrm{n}$ respectively.