Question

Chemistry help please! I don't know how to solve for atomic mass or density with and without electrons...Question is:

Determine the mass of one atom of each element (in units of grams):

Include Electrons Do Not Include Electrons

Mass of Chromium atom: _ _

Mass of Molybdenum atom: _ _

Mass of Tungsten atom: _ _

Determine the density of one atom of each element using the data in Table 1 below (in units of g mL ^-1):

Include Electrons Do Not Include Electrons

Density of Chromium atom: _ _

Density of Molybdenum atom: _ _

Density of Tungsten atom: _ _

Table 1:

Mass of Subatomic Particles (g)

Proton 1.672623 E-24

Neutron 1.674928 E-24

Electron 9.109387 E-28

Mass Number of Most Abundant Isotope Atomic Radius(pm)

Chromium 52 124.9

Molybdenum 98 136.2

Tungsten 184 137.0