Question

What is the atomic number of attom​

Answer 1

Answer:

ATOMIC NUMBER

Atomic number is the number of protons.

Answer 2

The atomic mass is the mass of an atom. Its unit is the unified atomic mass unit (symbol: u, or Da) where 1 unified atomic mass unit is defined as 1⁄12 of the mass of a single carbon-12 atom, at rest.The protons and neutrons of the nucleus account for nearly all of the total mass of atoms, with the electrons and nuclear binding energy making minor contributions. Thus, the atomic mass measured in u has nearly the same value as the mass number.

When divided by unified atomic mass units, or daltons, to form a pure numeric ratio, the atomic mass of an atom becomes a dimensionless value called the relative isotopic mass. Thus, the atomic mass of a carbon-12 atom is 12 u , but the relative isotopic mass of a carbon-12 atom is simply 12.

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