| atomic number | the order of an element in Mendeleyev's table of the elements |
|---|---|
| atomic number | a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas |
| atomic number | a colorless odorless gaseous element that give a red glow in a vacuum tube |
| atomic number | a radioactive transuranic metallic element produced by bombarding plutonium with neutrons |
| atomic number | a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium |
| atomic number | a radioactive transuranic element synthesized by bombarding curium with carbon ions |
| atomic number | a radioactive transuranic element synthesized from californium |
| atomic number | a radioactive transuranic element which has been synthesized |
| atomic number | a transuranic element that has not been found in nature |
| atomic number | a transuranic element |
| atomic number | a transuranic element that has not been found in nature |
| atomic number | a silvery soft waxy metallic element of the alkali metal group |