2007-01-03 11:53:58 · 24 answers · asked by LISA V A 1 in Science & Mathematics ➔ Mathematics
hydrogen
2007-01-03 11:55:04 · answer #1 · answered by Erik N 4 · 1⤊ 1⤋
Check the Focus Physical Review article below about the exotic atom positronium. It's a short-lived atom consisting of an electron and an anti-electron, or positron. Not only they exist, physicists have been able to produce some molecules with positronium atoms. Because a positron is far lighter than a proton, a positronium is lighter than an hydrogen atom.
Do I get my 10 points?
2007-01-03 20:23:23 · answer #2 · answered by Scythian1950 7 · 0⤊ 1⤋
Hydrogen (H). Check your periodic table of elements. Hydrogen has the least number of neutrons and electrons. The next lightest is Helium (He).
2007-01-03 19:56:24 · answer #3 · answered by evilive 4 · 1⤊ 0⤋
Hydrogen
2007-01-03 19:56:05 · answer #4 · answered by Chug-a-Lug 7 · 0⤊ 1⤋
Hydrogen
2007-01-03 19:56:05 · answer #5 · answered by KM 3 · 1⤊ 1⤋
Hydrogen is correct. The lightest metal is lithium.
2007-01-03 20:11:35 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Paris Hilton
2007-01-03 20:02:02 · answer #7 · answered by iluvafrica 5 · 0⤊ 1⤋
Hydrogen - it's #1 on the periodic table. Helium is #2.
2007-01-03 19:56:20 · answer #8 · answered by CG 6 · 2⤊ 1⤋
Hi. Hydrogen is the obvious answer, but helium is more likely to be found in gas and lithium is more likely to be found in the crust. Take your pick.
2007-01-03 19:57:19 · answer #9 · answered by Cirric 7 · 1⤊ 0⤋
H+ which is hydrogen without its electrons, so it's pretty much just a single proton floating around, which is still considered hydrogen.
2007-01-03 19:57:14 · answer #10 · answered by rawr♥ 1 · 1⤊ 0⤋
Hydrogen.
2007-01-03 19:54:56 · answer #11 · answered by Anonymous · 4⤊ 1⤋