Atomic mass is defined as the number of protons and neutrons in an atom, where each proton and neutron has a mass of approximately 1 amu (1.0073 and 1.0087, respectively). The electrons within an atom are so miniscule compared to protons and neutrons that their mass is negligible. The carbo...
What is the size of a hydrogen atom in meters? How much does a proton weigh? Calculate the electric force between a carbon nucleus that has twelve protons and a helium nucleus with two protons that is 675 um away. How to find the principal quantum number?
If a piece of aluminium consists of 6.02*10^{23} atoms, how much does it weigh? How do atoms have nuclear decay in nature? Is it due to oxygen or nitrogen? How can we tell how atoms react with each other by looking at the periodic table and how can we tell if an electron has ...
Do remember that the atomic number is the number of protons (or positive charges) in a nucleus. It was a discovery made by Henry G J Moseley. Moseley found that certain lines in the X-ray spectrum moved each time he was using a new element. He rearranged the different ...