what element is not really and alkali metal but has only 1 electron?
492219
Hmmm....\n\nYour science grade cannot be helped if you can't figure out that Hydrogen, a gas, is not an alkali metal.
988938
Matter (116 Elements known so far) (94 of them found elsewhere in the universe, to date) and anti-matter (the same elements but with anti-protons in the nucleus and positrons instead of electrons circling around the nucleus),\n\nWhat are these Elements called?\n\nIn 1959 Tom Lehrer sang the following ditty to a Harvard audience (to the tune of Gilbert and Sullivan's I am the Very Model of a Modern Major General)\n\n``There's antimony, arsenic, aluminum, selenium, \nAnd hydrogen and oxygen and nitrogen and rhenium \nAnd nickel, neodymium, neptunium, germanium, \nAnd iron, americium, ruthenium, uranium, \nEuropium, zirconium, lutetium, vanadium \nAnd lanthanum and osmium and astatine and radium \nAnd gold, protactinium and indium and gallium (inhale) \nAnd iodine and thorium and thulium and thallium. \n\n``There's yttrium, ytterbium, actinium, rubidium \nAnd boron, gadolinium, niobium, iridium \nAnd strontium and silicon and silver and samarium, \nAnd bismuth, bromine, lithium, beryllium and barium.  \n\n``There's holmium and helium and hafnium and erbium \nAnd phosphorous and francium and fluorine and terbium \nAnd manganese and mercury, molybdinum, magnesium, \nDysprosium and scandium and cerium and cesium \nAnd lead, praseodymium, and platinum, plutonium, \nPaladium, promethium, potassium, polonium, and \nTantalum, technetium, titanium, tellurium, (inhale) \nAnd cadmium and calcium and chromium and curium. \n\n``There's sulfur, californium and fermium, berkelium \nAnd also mendelevium, einsteinium and nobelium \nAnd argon, krypton, neon, radon, xenon, zinc and rhodium \nAnd chlorine, carbon, cobalt, copper, \nTungsten, tin and sodium. \n\n``These are the only ones of which the news has come to Harvard, \nAnd there may be many others but they haven't been discovered.'' \n\n(a few of the 116 eg Seaborgium were discovered after 1959 and are therefore not in the song)\n\nFor a Flash animation of the song go to \nhttp://www.privatehand.com/flash/elements.html
764959
Metals generally form positive ions. Nonmetals generally form negative ions. The major exception is Hydrogen, a nonmetal that predominantly forms positive ions.
833318
Hydrogen.  To be more specific, the H1 isotope.  The deuterium or H2 atom is only one in eight thousand of all hydrogen atoms.\nThe second most common element, helium, is less than 10%.  All others together are a minor component, no matter how important to us.
914809
Not for an atom but it is for an electron.
965795
There are more protons than electrons. Protons are plus. Electrons are minus. In hydrogen ion, there is one proton and zero electrons!
770837
1) 2\n2) 4\n3)17\n4) Ar\n5) 118\n6) metallic\n7) 92U239\n8) has its valence electron farther from the nucleus\n9) americium and curium\n10) Ne0\n11) 20\n12) neutrons\n13) 1\n14) 8\n15) +2\n16) hydrogen\n17) 18\n18) 17\n19) an ion\n20) proton
856024
Alkali earths are the elements of group 2.\nAlkali metals are the elements of group 1.\n\nHere are the properties of group 2\nhttp://en.wikipedia.org/wiki/Alkaline_earth_metal\n\nHere are the properties of group 1\nhttp://en.wikipedia.org/wiki/Alkali_metal\n\nYou can compare them.\n\nHere is the water reaction with elements of group 1 (example K)\n\n2K (s) + 2H2O (l) → 2KOH (aq) + H2 (g)\n\nHere is the water reaction with elements of group 2 (example Mg)\n\nMg + 2H2O → Mg(OH)2 + H2\n\nAs you go to the extremes of the table and down the table the reactivity is higher because the electronegativiy is lower so they have a greater tendency to lose the electron and react.
778216
the alkali earth metals are Be,Mg,Ca,---etc. there valance electrone is +2\nso there hydroxides are\nBe(OH)2\nMg(OH)2\nCa(OH)2\n---\n--etc
219893
Lithium #3 on the atomic table. has a valence of 1 so it is quite reactive. If this electron is stripped off then by the formula 2n^2 the remaining 2 electrons would be a complete valence and so it is very non-reactive.
82058
A normal Hydrogen atom has one proton and one electron.  If you strip away the electron, you are left with the Hydrogen +1 ion, which is the same thing as a proton.\n\nThere are two other Hydrogen isotopes (much MUCH less common than Hydrogen-1), there are Hydrogen-2 (1 proton, 1 neutron, 1 electron), and Hydrogen-3 (1 proton, 2 neutron, 1 electron).\nIf you were to strip away their electrons, they would still be the a Hydrogen +1 ion, but would be heavier since they have an extra 1 or two neutrons.
882538
Because, it only has one electron on its outermost shell. and thus is placed with group 1 atoms (which also have one electron on thier outermost 'shell')
728320
Um...one doesn't "make" mercury--it's an element.
417996
The elements with 2 valence electrons are called the alkaline earth elements. They are metallic elements that have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found free in nature.\n\nThe Alkaline Earth Metals are:\nBeryllium\nMagnesium\nCalcium\nStrontium\nBarium\nRadium
507827
Because it has only one reactive electron in its outer shell like all the other group one metals.
69353
d)Argon: 1s2 2s2 2p6 3s2 3p6\ne)Could be carbon, silicon, germanium, tin, or lead.  It's not specific enough.  And there is no such thing as an "elemen." Please treat chemistry with enough respect just type a "t" at the end of a word.  \nCarbon: 1s2 2s2 2p2\nSilicon: 1s2 2s2 2p6 3s2 3p2\nGermanium:  1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2\nTin: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4d6 5s2 4d10 5p2 \nLead: \n1s2 2s2 2p6 3s2 3p6 4s2 3d10 4d6 5s2 4d10 5p6 6s2 4f14 5d10 6p2
835803
In a stable atom, not an ion, the # of electrons equals the # of protons, so potassium would have 19 protons, and 19 electrons.  Protons and Neutrons make up the atomic weight of the atom, so you take the atomic weight and subtract the atomic # and you are left with # of neutrons.  39.0938-19=20 because you round, you can't have a fraction of a neutron.  Therefore, there are 20 neutrons, 19 electrons, and 19 protons.