Definition of atomic number in English:
nounChemistry & Physics
The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table. (Symbol: Z)
- In those cases in which the number of protons changes, the new nucleus has a different atomic number, and it therefore belongs to a different element.
- In a neutral atom, the number of electrons is equal to the number of protons, therefore, the atomic number also indicates the number of electrons in an atom.
- We now have data on the properties of 29 new nuclei with atomic numbers between 104 and 118.
Definition of atomic number in:
- British & World English dictionary
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.
Most popular in the US
Most popular in the UK
Most popular in Canada
Most popular in Australia
Most popular in Malaysia
Most popular in Pakistan