NOUN
- the order of an element in Mendeleyev's table of the elements; equal to the number of protons in the nucleus or electrons in the neutral state of an atom of an element
How To Use atomic number In A Sentence
- Atomic number 101 is a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles.
- In fact, the elements with atomic numbers 43, 61, and 85 (technetium, promethium, and astatine, respectively) were unknown on earth until some of their radioactive isotopes had been produced synthetically.
- The isotope with 177 neutrons decays down to dubnium (atomic number 105), whereas the isotope with 176 neutrons decays down to roentgenium (atomic number 111). Latest Science News Features, Blog Entries, Column Entries, Issues, Articles and Book Reviews
- Depending upon which chemist you ask, rare earth elements consist of either: the so-called lanthanide series (elements having atomic numbers from 57 [corresponding to lanthanum] to 71 [corresponding to lutetium] The Full Feed from HuffingtonPost.com
- When assigning priority to groups, atoms that are directly bonded to the carbon atom have their priority based upon their atomic number.
- Zinc (pronounced/ˈzɪŋk/, from German Zink), also known as spelter, is a metallic chemical element; it has the symbol Zn and atomic number 30. PhpBB.com
- All atoms of the same element have the same atomic number; for exam-ple, the atomic number of carbon is 6.
- The transfermium elements are those elements with atomic numbers greater than 100, the atomic number for fermium.
- Actinides are the elements above atomic number 89 and are usually radioactive.
- As a result of the nucleon transformations, a new proton is left behind in the nucleus and the atomic number of the atom is raised by one.
