atomic number
It is about the atomic numbers. The total of protons.
Oxidation Numbers
An atom does not have an electrical charge. Atoms have equal numbers of positively charged protons and negatively charged electrons. If there are not equal numbers of protons (+1) and electrons (-1) then it is not called an atom, it is called an ion.
ATOMIC MASS ;The total numbers of protons and neutrons present in the nucleus of an atom is called atomic mass and it is represented by A ATOMIC NUMBER;the number of protons in the nucleus of an atom are called atomic number or proton number and it is represented by Z
On average, in any atom, you will have the same number of electrons and protons.
The total mass of the protons and neutrons in an atom is called the atomic mass or mass number. It is often represented by the symbol A.
The atomic mass.
mass number = protons + nuetrons
The mass number of an atom is the sum of the numbers of protons and neutrons in the nucleus of the atom. It also indicates the total positive charge on the nucleus.
The sum is called mass number.
Mean
When adding numbers, the total is the sum. The sum of two odd numbers is even.