2006-10-25 05:52:40 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
what do you mean like... ions? If so, ions are atoms of certain element, with the difference that they have a different amount of electrons than the neutral atom. For example: Cu 2+ is an ion of Copper that lost two electrons from its valence shell. Since a neutral atom of Cu has 29 electrons (the same number than protons), the Cu 2+ has 27 electrons, because 29 - 27 = 2. Anions like these are called cations, and generally metals are cations, due to the fact that by loosing electrons they get a much more stable valence shell. The other ions (the ones that take in electrons) are called anions, and they are usually non-metals, since non-metals can achieve a noble gas shell by taking in electrons. For example, O 2- is an anion of neutral Oxygen; due to the fact that Oxygen has a configuration of 1s2-2s2-2p4
[(↑↓)///valence shell→(↑↓)(↑↓)(↑_)(↑_)], it has 2 unpaired electrons in 2 of the p orbitals. By adding two electrons it completes its octet, just like Ne: 1s2-2s2-2p6.
2006-10-25 06:24:47 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Dear Ro,
I think you need to rephrase the question, because all elements can contain a varying number of electrons. One way that this can happen is by ionisation. For instance an atom of argon normally contains 18 electrons, but in an electric discharge tube, it can lose one or more electrons, to form a positively charged argon ion, finishing up with 17 electrons or fewer. Electrons can also be added, as happens when a chlorine atom (17 electrons) adds one to form the negatively charged chloride ion (18 electrons) or an atom of oxygen (8 electrons) adds two to form an oxide ion with a double negative charge (10 electrons).
Allan Deeds.
2006-10-25 14:08:29 · answer #2 · answered by deedsallan 3 · 0⤊ 0⤋
adding or subtracting electrons from an atom makes an ion.
2006-10-25 12:57:29 · answer #3 · answered by The Cheminator 5 · 0⤊ 0⤋
all atoms have different numbers of electrons- atoms which have different numbers of neutrons are called isotopes.
xxx
2006-10-25 12:55:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Impossible! Do you mean a varying number of neutrons? If so, an ISOTOPE is probably what you're after.
2006-10-25 12:55:23 · answer #5 · answered by JJ 7 · 0⤊ 0⤋
I'm going to go with ions
2006-10-25 13:32:44 · answer #6 · answered by fleisch 4 · 0⤊ 0⤋
isobars
2006-10-25 13:34:27 · answer #7 · answered by scarface 2 · 0⤊ 0⤋