Atomic Number 2 (Noun)
Meaning
A very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas).
Classification
Nouns denoting substances.
Examples
- Helium's atomic number 2 is the least among the noble gases in the periodic table of elements.
- As a result of its atomic number 2, helium is a simple atom consisting of two protons, neutrons, and electrons.
- The atomic number 2 of helium shows it can have very few electrons in its outer energy level.
- Helium was first synthesized to confirm the atomic number 2 discovered by Janssen and Lockyer in the total solar eclipse.
- Quantum mechanics explains many aspects of helium with atomic number 2.