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Why does the octet rule not hold for many compounds containing elements in the third row of the periodic table and beyond?
Wiki User
∙ 13y ago
Atoms of elements in the third period are less subject to destabilization from additional electron-electron repulsions.The third shell contains d orbitals that are relatively close in energy to 3s and 3p orbitals and provide an allowed energy state for extra electrons.Atoms of elements in the third period have the space and available orbitals to accommodate extra electrons.
Wiki User
∙ 13y ago
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What is special about all the elements beyond uranium on the periodic table?
These elements are called transuranic elements.
What elements are not on the periodic table?
you will find almost everything about the element in the periodic table like its atomic mass and its atomic number, chemical affinity also its electronegative but you wont find when the element was discovered or weather it is found in free state or oxides in nature
Which elements are not in the periodic table song by Tom Lehrer?
There are 102 elements named in the song lyrics, in a totally disorderly order. The date of the song (1960-ish) gives a clue to which elements. For a long time around then there were just 102 recognised elements, all atomic numbers up to 102, and 103 and beyond were in process of discovery and recognition. So the elements that were not included were those artificial elements that had not yet been recognised: elements 103-114 and 116.
What is the first actinide element?
ActinidesThis is a group of elements within the periodic table and are also known as the transuranics. The name refers to those elements with increasing atomic no. from actinium, which all have similar chemical properties, like the lanthanides. The first few members of the group are the naturally occurring elements actinium, thorium, proactinium and uranium. Beyond this elements have been made artificially by radioactive bombardment. These artificial elements are unstable, some have very short lifeimes and undergo spontaneous radioactive decay.
Transuranic elements are those beyond what atomic number?
92 92
What is special about all the elements beyond uranium on the periodic table?
These elements are called transuranic elements.
Elements beyond uranium in the periodic table do not exist?
All the elements after uranium exist but excepting neptunium and plutonium (present in the earth crust only in ultratrace concentrations) they are man made.
What are synethic elements?
See the periodic table - elements with the atomic number beyond 94.
Why scientists believe no elements are missing in the periodic table?
The periodic table contains all the known elements. Scientists have spent decades looking for new elements and, so far, haven't found any beyond what are on the periodic table as it stands now.
What is a supernova shrapnel?
Elements from the entire periodic table, including elements beyond uranium. The elements beyond iron and nickel cannot be formed in ordinary stellar fusion. Most of the cloud of supernova shrapnel is highly radioactive for years or even centuries due to the presence of isotopes with excess neutrons, which causes ionization glow of this material which can be observed with telescopes.
All of what element's isotopes are radioactive?
Technetium, Promethium, and all elements heavier than Bismuth.
Is our periodic table complete?
The periodic table is complete for all known elements and has no gaps that could be filled with unknown elements. However the periodic table is inherently open ended, additional radioactive elements can in principle always be added beyond the most massive known element if we create them in particle accelerators (such elements may have also been created in the initial moments of supernova explosions). However all of these new elements are very difficult to create and even more difficult to detect and verify once created as they decay back to known lighter elements almost instantly.
How do heavier elements on the periodic table form?
A few elements past iron can form in the star by neutron capture and beta decay. However the majority can only be formed by the blast shockwave of a supernova, which can form elements significantly beyond Uranium.
What elements are not on the periodic table?
you will find almost everything about the element in the periodic table like its atomic mass and its atomic number, chemical affinity also its electronegative but you wont find when the element was discovered or weather it is found in free state or oxides in nature
What are the elements beyond uranium in the periodic table?
Transuranic elements: Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No, Lr, Rf, Db, Sg, Bh, Hs, Mt, Ds, Rg, Uub, Uut, Uuh, Uuq, Uup, Uuo.
What is the fifth element of nature?
Boron is the element at number 5 of the periodic table of the elements.
The Kuiper belt is a region beyond Neptune containing?
My mom
