The Atomic Mass number tells the Atomic Mass of an element. The mass is calculated as the mass of all the protons and neutrons in the center of an atom.
For chemists the meaning of atomicity is the number of atoms in a molecule. In the past, rarely, the word atomicity was used as an equivalent for valence (if you think to valence the answer is very long for WA for all the elements).
The atomicity of an element is determined by its tendency to form molecules and is related to the number of atoms that make up a molecule of that element. It is not calculated using a formula but can be determined based on the chemical structure of the element or compound. For example, diatomic elements like oxygen (O2) have an atomicity of 2, while monoatomic elements like helium (He) have an atomicity of 1.
H-2 He- Li-2 Be- B-2 C-2 or as diamond N-2 O-2,3 F-2 Ne- Na- Mg- Al- Si- P- S-8 Cl-2 Ar- K- Ca-
the atomicity of ozone is 3 hehehehe./////////////......................
The number of atoms constituting a molecule is known as its atomicity. On the basis of atoms present in that particular element we can find out the atomicity. To find the atomicity you should know the valency of that atom. Try to remember the atomic number of the elements in the periodic table. From this you can easily find out the electronic configuration and hence the valency.
The atomicity of neon is 1, meaning it exists as individual atoms. Phosphorus can exist in several allotropes with different atomicities: white phosphorus has an atomicity of 4, red phosphorus has an atomicity of 1, and black phosphorus has an atomicity of 1.
The atomicity of oxygen in ozone is 3. This means that each molecule of ozone contains three oxygen atoms.
To find the atomicity of an ideal gas you can use γ = Cp/Cv.
Hydrogen has an atomicity of 1, meaning that its molecules consist of single hydrogen atoms.
The valence electrons
35.4528
23