Answer:
23
Explanation:
The total number of neutrons and protons of an atom is called atomic mass. The atomic mass unit is Dalton. It is represented as Da and is the standard unit used to indicate the mass of an atom. The atomic mass of elements differs as it depends on the number of protons and neutrons in a particular element.
The atomic mass of sodium
Sodium is an alkali metal that comes first in the periodic table of the 3rd period. It is the eleventh element in the table.
The atomic number of sodium = 11
In the nucleus of the sodium, the number of neutrons = 12
The atomic mass number of sodium (Na) = 11 + 12 = 23
∴ Atomic mass of sodium = 23 g/mol
