0
The "expected" answer is helium, neon, and argon, BUT
-- in 2000 there was a claim that the first argon compound had been made
-- no compounds of elements 99 and above are really "known", since most of these elements last less than an hour, and have never been made in quantities of more than a few atoms at a time. We "know" of many compounds that must exist, and have a very good sense of what their properties are, but compounds have not actually been prepared and characterized.
-- it is very doubtful that any francium compound has been isolated and characterized, although those of the other very unstable lighter elements promethium, astatine, actinium, and protactinium have been.
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What 3 elements do all carbon compounds have in common?
There are 2 elements that all the organic compounds have. They are carbon and hydrogen. Most organic compounds contain oxygen.
What are the compounds of lithium?
Lithium is not a compound. It is element #3 on the Periodic Table of Elements.
What will be the oxidation number atom B?
0 in the elemental form, +3 in its compounds
What is borons oxidation number?
0 in elemental form +3 in its compounds
What is the oxidation number for indium?
0 in the elemental form, +3 in its compounds.
Are compounds and elements a mixture?
No. Elements, compounds and mixtures are 3 different terms.
Is group fifteen an ionic compound on the periodic table?
Group 15 elements generally form covalent compounds. However the two elements from group 15 nitrogen and phosphorus are known to form nitride (N3-) and phosphide (P3-) ions as in Na3N or Na3P.
What 3 elements do all carbon compounds have in common?
There are 2 elements that all the organic compounds have. They are carbon and hydrogen. Most organic compounds contain oxygen.
What are 3 essential properties of every material?
elements and compounds
What are the 3 essential properties of every material?
elements and compounds
What is the charge of a Xe ion?
1.what is the oxidation state in xenon in HXeO4- and ... xenon is +7. As= +3 ... Xe = +7. As = +3 ... Except when highly electropositive elements are involved
What are some covalent compounds with more than three elements?
Nucleic acids would be one example of a covalent compound with more than 3 elements. Proteins have more than 3 elements as well. Many organic compounds do, it is quite common.
How many what elements can for compounds with expanded octet....I O Cl Xe...?
3
What are the compounds of lithium?
Lithium is not a compound. It is element #3 on the Periodic Table of Elements.
Besides carbon name 3 other elements that make up most organic compounds?
Three other elements that make up most organic compounds are: 1. NITROGEN 2. HYDROGEN 3. OXYGEN
3 elements most often found in organic compounds?
Carbon, Oxygen, and Hydrogen.
What are Five elements and five compounds that exist as gases at?
compounds:- 1.hp 2.hcl 3.hbr 4.hi 5.co elements:- 1.hydrogen 2.nitrogen 3.oxygen 4.fluorine 5.chorine
