For example, the atomic number of sodium is 11. Every sodium atom has 11 protons and 11 electrons. It has 11 positive charges and 11 negative charges. The mass number of an atom is its total ...

The Periodic Table is a well-organized chart that contains all 118 known elements in the universe. These elements are the ...

This Q-value calculation programme allows you to calculate reaction Q-values and threshold energies and decay Q values based on the 1995 Update to the Atomic Mass Evaluation and to retrieve other ...

The Atomic Mass Data Center and its electronic bulletin are tools for the exchange of information on experimental masses, evaluation of masses, extrapolation of masses, and theoretical masses. One of ...

For example, the mass number of both argon atoms and calcium atoms is 40. The atomic number of a sodium atom is 11 and its mass number is 23. Calculate the number of protons, neutrons and ...