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.
Look at the periodic table. Mg is number 12, so it has 12 protons and 12 electrons. The +2 charge of a magnesium ion means the number of protons is 2 more than the number of electrons. To become a magnesium ion, 2 electrons are removed from the outer shell of the magnesium atom. The Mg +2 ion contains 12 protons and 10 electrons = +12 + -10 = +2 charge. The number of protons cannot change, unless the atom is radioactive. The nuclei of radioactive elements emit an alpha particle, which is composed of 2 protons and 2 neutrons. This process is called transmutation.