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You can determine the number of neutrons in an atom by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number). This will give you the number of neutrons in the atom.
To solve for the formula mass of a compound, add the atomic masses of all the elements in the formula, using the periodic table to find each element's atomic mass. For percentage composition, divide the total mass of each element in the formula by the formula mass of the compound, then multiply by 100 to convert it to a percentage. This provides the contribution of each element to the overall mass of the compound.
Atomic no.=no. of protons Atomic mass=no. of protons+no. of neutrons Hence, atomic mass is greater
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
Atomic mass
The atomic mass (or weight) of silver is 107.8682 amu (atomic mass units)
The atomic mass number of aluminum is 27. The atomic mass of aluminum is 26.98115386
Cobalt has an atomic mass of 58.933195(5) while nickel has an atomic mass of 58.6934(4). Nickel has the lower atomic mass.
The atomic mass of arsenic is approximately 74.92 atomic mass units.
The atomic mass of potassium is approximately 39.10 atomic mass units.
== == Atomic Mass: 54.93805 amu
Sulfur has an atomic mass of approximately 32.06 atomic mass units.