Wiktionary (0.00 / 0 votes) Rate this definition: floater (Noun) Agent noun of float; one who floats. floater (Noun) An employee of a company who does not have fixed tasks to do but fills in wherever needed, usually when someone else is away. floater (Noun)
25Mn-55 (the naturally occurring isotope) has 25 protons, 25 electrons and 30 neutrons, 25Mn-54 has 29 neutrons instead but is not a stable isotope. 25Mn-55 (the naturally occurring isotope) has 25 protons, 25 electrons and 30 neutrons, 25Mn-54 has 29 neutrons instead but is not a stable isotope.
Scandium's atomic number is 21. Therefore, neutral scandium has 21 protons and 21 electrons. Scandium's only stable isotope is 45Sc, which has 45 - 21 = 24 neutrons. Scandium's atomic number is 21. Therefore, neutral scandium has 21 protons and 21 electrons.