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Helium is unreactive as it has a completely filled outer (valence) shell. Its electronic configuration is 1s2. The ouer shell of the next heaviest noble gas neon is also full, and its electronic configuration is 1s2 2s22p6. However the heavier elements in the group Argon, Krypton, Xenon have the same ns2 , np6 octet as Neon which imparts considerable stability but means that the outer valence shell is not complete and as a consequence these elements have compounds, albeit highly reactive ones.
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What element would have a full valence shell on the periodic table?
The noble gases helium and neon are the only elements with completely full outer shells.
Why helium does not form ion easily?
it is a noble gas and is averse to losing its electrons from the outer shell of its atom and in which case it would become electrically charged
What does calcium not bond with?
I would imagine, logically, Calcium would react with every element except the Noble Gases - as they already have full outer energy levels, thus being unreactive. You will often find one calcium reacting with one element from group 6, for example Oxygen. CaO (as they strive to reach a full outer shell.)
Is the outer shell of nickel full?
The outer shell of nickel is not full. Nickel has an electron configuration of 4s2 3d8, so its outer shell has two electrons which is not the maximum it can hold (which would be 8).
If an atom were to have two protons then it would?
It would by definition be Helium (atom number = number of protons = 2) but the nucleus of the stable isotope 4He also contains 2 neutrons (the mass number = total number of p's and n's = 4)
What type of bond would likely form with Helium and Helium atoms?
No bond at all, He has a complete outer shell
What element would have a full valence shell on the periodic table?
The noble gases helium and neon are the only elements with completely full outer shells.
Why helium does not form ion easily?
it is a noble gas and is averse to losing its electrons from the outer shell of its atom and in which case it would become electrically charged
What does calcium not bond with?
I would imagine, logically, Calcium would react with every element except the Noble Gases - as they already have full outer energy levels, thus being unreactive. You will often find one calcium reacting with one element from group 6, for example Oxygen. CaO (as they strive to reach a full outer shell.)
Why it would be coreect to say that helium has chemical properties?
But of course. One of its properties is that it is very unreactive.
Where or the periodic table would you find elements that will not react with other elements?
Elements that generally do not react with other elements are found in the noble gases group on the far right of the periodic table, such as helium, neon, argon, krypton, xenon, and radon. These elements have a full outer electron shell, making them stable and unreactive.
Which would be least reactive because its last electron shell is full with 2 electrons 1.helium 2.neon 3.lithium 4 bromine?
Helium would be least reactive because its last electron shell is full with 2 electrons, giving it a stable electron configuration. Neon also has a full outer electron shell but belongs to the noble gases group. Helium is a noble gas, hence more stable and less reactive compared to lithium and bromine.
How many electrons does an atom have to have in the outer shell to not form chemical bonds?
An atom would need to have a full outer shell with 8 electrons (or 2 electrons for helium) to be stable and not form chemical bonds. This is known as the octet rule, where atoms tend to gain, lose, or share electrons to achieve a full outer shell.
What is an example of an unreactive element?
Basically all the noble gases as they have a stable electronic configuration and therefore they would not share their electrons with other atoms. -- Actually, the noble gases have been synthesized in labs to form noble gas compounds. Gold and platinum are both unreactive elements. There are probably more though.
Does calcium have a full outer shell?
Calcium has a full 4s sublevel, but does not have a full "outer shell", per se, because it is not a noble gas.
What is the outer shell of a chimpanzee?
That would be their skin.
An atom of element X has two outer electrons that do not fill the outer shell is it a metal?
It would be a non-metal and a halogen. Group 18 or the noble gases, all have 8 electrons in their outer shell. Therefore, the group before it would have seven electrons in the outer shell. This group is made up of all non-metals.
