What is their group number?
Why were these gases considered to be inert or stable?
What is their oxidation number?
2007-03-08 00:40:31 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
group 0-zero as per latest convention.
Outer orbital has octet of electron.
Oxidation of Noble Gases?... you are kidding...
Noble gases DO react under certain conditions... but are generally inert. It has positive oxidation number.
Though old group number indicates oxidation number of elements in the group but it is not the final value and there are exceptions.
Group number is the maximum Oxidation number.It may be less... and more( noble gas) in some cases.
2007-03-08 00:57:06 · answer #1 · answered by balsmin 3 · 0⤊ 1⤋
The Noble gases are the group on the far right of the periodic table. Depending on the numbering system, it may be known as Group VIII or Group 18.
They have an outer shell of 8 valence electrons and do not react. That's why they are called noble or inert.
p.s. The larger ones, e.g. Xe, can react under certain conditons).
2007-03-08 00:48:04 · answer #2 · answered by reb1240 7 · 1⤊ 0⤋
Group Number 18... see numbers that label columns on a periodic table.
They are chemically inert or stable. That means that they rarely react with other elements or compounds in chemical reactions. These elements, noble gasses, are generally found on their own, not bonding chemically to other atoms. For comparison, oxygen is NOT inert, it is quite reactive, it forms many compounds by combining with other elements-H2O water, CO2 carbon dioxide, FeO iron oxide or rust, etc. . . A simple rule that often works for predicting chemical reactions is called the octet rule. Atoms are chemically stable when they have exactly 8 electrons in their outermost energy levels. Noble gasses have 8 electrons already, without bonding with other atoms. Oxygen, in contrast only has 6 on its own and has to get two more by bonding with other elements in chemical reactions.
Most noble gasses have no oxidation number. I guess you could say zero, but more clear I think to say that they have no oxidation number because they do not react at all. They don't form ions. They don't share electrons in covalent bonds, etc. In comparison, oxygen again, as it needs to gain two electrons, has an oxidation number of -2. Oxidation numbers are supposed to indicate how atoms behave during chemical reactions.
***I doubt this would be important, but sometimes Krypton and Xenon, which are noble gasses, Sometimes they can form compounds. Some periodic tables I have seen give them oxidation numbers because of this. I would say that is an exception to the rule. If you are looking for a simple answer I would say they do not have oxidation numbers.
2007-03-08 02:40:06 · answer #3 · answered by Christopher L 2 · 0⤊ 0⤋
1) They are Group 8 (VIII)
2) They are inert or unreactive due to being exceptionally stable - they have a full complement of electrons in their outer shell, and therefore do not need to form ionic bonds with other substances.
3) Not sure....
2007-03-08 00:48:50 · answer #4 · answered by Doctor Q 6 · 1⤊ 0⤋
The are group VIIIA (the far right column). They are considered stable becauase all of their orbitals are filled with electrons, therefore they have an oxidation number of 0.
2007-03-08 00:48:26 · answer #5 · answered by Anonymous · 0⤊ 0⤋
they are gruop 18
they have full valence elctrons on their outermost shells
2007-03-08 00:48:59 · answer #6 · answered by mr.maths 2 · 0⤊ 0⤋