alpha emitting
111Neptunium — uranium ← neptunium → plutonium Pm ↑ Np ↓ (Uqt) …
112Speed of light — The speed of light in the vacuum of free space is an important physical constant usually denoted by the letter c . [NIST and BIPM practice is to use c 0 for the speed of light in vacuum in accord with international standard ISO 31 5. See… …
113Lost in Space — For other uses, see Lost in Space (disambiguation). Zachary Smith redirects here. For other uses, see Zach Smith (disambiguation). Lost in Space Publicity photo (1967) for Lost in Space: shows cast members: Angela Cartwright, Mark Goddard, Ma …
114Megatron — For other uses, see Megatron (disambiguation). Not to be confused with Pegatron. Megatron is a character from the Transformers franchise, created by toy companies Hasbro and Takara. He is the primary antagonist and leader of the evil faction… …
115Neutron cross-section — The total neutron cross section of an isotope of a chemical element is the effective cross sectional area that an atom of that isotope presents to neutron scattering and absorption. cattering versus absorptionWhen a neutron approaches an atomic… …
116Isotopes of neptunium — Neptunium (Np) is an artificial element, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. The first isotope to be synthesized was 239Np in 1940, produced by bombarding 238U with neutrons to …
117Decay scheme — The Decay scheme of a radioactive substance is a graphical presentation of all the transitions occurring in a decay, and of their relationships. Decay schemes of radioactive isotopes Decay scheme of 60Co These relations can be quite complicated;… …
118List of characters in X-Men (TV series) — This character list regards the 1990s X Men series; for the series starting in 2000, see . For other uses see X Men (disambiguation) . Hero Teams X Men * Professor Xavier, voiced by Cedric Smith. The founder of the X Men, Professor Xavier is very …
119Radium — The celebrated radioactive element discovered by Marie and Pierre Curie in 1898. * * * A metallic element, atomic no. 88, extracted in very minute quantities from pitchblende; 226Ra, its longest lived isotope, is produced as an intermediate in… …
120Neon — This article is about the noble gas. For other uses, see Neon (disambiguation). fluorine ← neon → sodium …
