|
|
| a·tom·ic num·ber (plural a·tom·ic num·bers) |
noun |
|
| Definition: |
| |
number of protons in atom: the number of protons in the nucleus of an atom of an element and its isotopes, used to determine that element's position in the periodic table
Symbol Z
  The atomic number of carbon is 6.
|
|
Hotmail
