how many electrons are needed in the outer energy levels of most atoms to be chemically stable?
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To be stable an atom will gain, lose, or share electrons to complete the outer most energy level (electron shell). Octet Rule because levels 2 and 3 need 8 electrons to be stable.
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The halogen elements have seven valence electrons in their outermost electron shell. Therefore, when these elements can receive an electron from another atom, they form very stable compounds since their outermost shell is full.
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The electrons that occupy the outermost shell of an atom are called valence electrons. Valence electrons are important because they determine how an atom will react. By writing an electron configuration, you'll be able to see how many electrons occupy the highest energy level.
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In double bond there are two hydrogen atoms attached to each carbon . As carbon has atomic no. 6 and other most shell has4 electrons . It needs more 4 elections to be stable .
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Outside the nucleus, four energy levels are needed to hold the 28 negatively charged electrons. The electron configuration of Nickel is Na 2, 8, 16, 2 where 2 electrons are present in the shell closest to the nucleus, 8 in the second closest, 16 in third and 2 in the outer shell, better known as the valence shell.
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Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. Sodium atoms have 11 electrons. Two of these are in the lowest energy level, eight are in the second energy level and then one electron is in the third energy level.
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Row 3 elements on the left lose electrons to gain a full outer shell, elements on the right usually gain electrons to have 8 electrons in their outer shell. The basis of the octet rule is that atoms 'want' a full outer shell of electrons, i.e. they are most stable with a full outer shell.
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there are 15 electrons in total, there must be 5 electrons at the third energy level. there are 3 energy levels, so the electrons at the third are outer, or valence, electrons. this means that there are 5 valence electrons. all neutral atoms of the elements in group 5 have 5 valence electrons.
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octet rule: Atoms lose, gain, or share electrons in order to have a full valence shell of eight electrons. Hydrogen is an exception because it can hold a maximum of two electrons in its valence level.
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These elements, including hydrogen (H), lithium (Li), and sodium (Na), all have one electron in their outermost shells. That means that they can achieve a stable configuration and a filled outer shell by donating or sharing one electron with another atom or a molecule such as water.
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Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. ... Two of these are in the lowest energy level, eight are in the second energy level and then one electron is in the third energy level.
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Why Are Valence Electrons Important? Valence electrons are the electrons in the outermost energy level of an atom — in the energy level that is farthest away from the nucleus. ... Being able to determine the number of valence electrons in a particular atom gives you a big clue as to how that atom will react.
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Atoms like sodium, with only one or two electrons in a valence shell that needs eight electrons, are most likely to give up their valence electrons to achieve a stable state. All these atoms need is another atom that can attract their electrons!
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Electronic configuration includes - 2,8,8,1. According to the octet rule, the atom or ion to be stable has to have 8 electons in the outermost shell.
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The octet rule is the understanding that most atoms seek to gain stability in their outer most energy level by filling the s and p orbitals of the highest energy level with eight electrons.
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['Elements having the maximum number of electrons that can be accommodated in their last shell or orbit are known as stable elements.', 'In the case of Helium , the helium atom contains only one shell . ... ', 'Other examples are Neon(Ne), Argon(Ar), Krypton (Kr), Xenon (Xe), Radon (Rn).']
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Valence electrons are those electrons farthest away from the nucleus of an atom. They are important in chemistry because they are responsible for determining the chemical behavior of an atom. ... There are a total of 5 (3+2) electrons in the fifth energy level. The chemistry of life is based on carbon.