atomic number 77
ریشه و کاربرد
ریشه
From the Latin word 'atomus' meaning 'indivisible' and the English word 'number'.
مثال
- The atomic number 77 corresponds to the element iridium.
- Iridium has an atomic number of 77.
- The atomic number 77 indicates the number of protons in an iridium atom.
تعریف انگلیسی
noun
- a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium