The mass of one atom of copper is 63.54627 u. Since there are 4 atoms in 1 gram, the mass of 4 atoms = 63.54627×4 = 255.20852 u.

The formula for calculating the mass of an element is:

Element Atomic Mass (u) = Number of Protons + Number of Neutrons. So for Cu, it is 63 + 29 = 92.

Now we can calculate the number of protons by looking at the periodic table:

Cu has 29 protons, so its atomic number is 29; and its atomic symbol, Z, is 29 (in this case). So we know that physically speaking, Cu has 29 protons in each atom.

The number of neutrons can be found using the following formula:

Neutron Number = 2N – Z, where N represents the number of neutrons present in each atom (for example 2N – Z = 3).

Last modified: August 17, 2022