17. SUMMARY: Based on this gizmo, the number of protons equals the The Atomic number
from the periodic table. The number of protons determines the
of an atom. The
and
determines the mass of an atom. The protons and neutrons are located in the
Nucleus
of an atom and electrons are in the
Outside of an nucleus

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.