# Boron is one position to the left of carbon on the periodic table. The atomic nurnber of carbon is 6. Given its position on the periodic table, what is the atomic number of boron?

Is not $Z = 5$...?
The 100 or so elements are characterized by ${Z}_{\text{atomic number}}$...which specifies the number of charged particles present in the element's nucleus. $\text{Z=1, hydrogen; Z=2, helium}$
$\text{Z=3, lithium; Z=4, beryllium; Z=5, boron; Z=6, carbon;}$ $\text{Z=7, nitrogen...}$