how many electrons are needed to fill a shell?
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Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
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Since krypton is in the far right row of the periodic table, its outermost shell is full with eight electrons. This is one of the happy elements and has an electron configuration of 2-8-18-8. The other inert gases including argon and xenon also have full outer shells with eight electrons.
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Transition metals are able to put more than eight electrons in the shell that is one in from the outermost shell. Think about argon (Ar).
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The shell closest to the nucleus, 1n, can hold two electrons, while the next shell, 2n, can hold eight, and the third shell, 3n, can hold up to eighteen. The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms.
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Each chlorine atom has seven electrons in its outer most shell. Each chlorine needs one more electron to gain a full outer shell and be stable. The chlorine on the left needs to share one electron to the chlorine on the right and the chlorine on the right needs to share one electron to the chlorine on the left.
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The electrons form layers (or shells) around the nucleus. The first layer can only hold two electrons; the next layer can hold a maximum of eight electrons; and the next layer can only hold 8 electrons.
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As element 34, it has 34 electrons. 2+8+18 is 28. Therefore, six electrons are on its valence shell. It all depends on shells accepting an amount of electrons.
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The fourth shell has 4 subshells: the s subshell, which has 1 orbital with 2 electrons, the p subshell, which has 3 orbitals with 6 electrons, the d subshell, which has 5 orbitals with 10 electrons, and the f subshell, which has 7 orbitals with 14 electrons, for a total of 16 orbitals and 32 electrons.
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The electrons form layers (or shells) around the nucleus. The first layer can only hold two electrons; the next layer can hold a maximum of eight electrons; and the next layer can only hold 8 electrons. The picture shows the electrons in a sodium atom.
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Copper has two electrons in the innermost shell, eight in the next shell, eighteen in the third shell, and one in the fourth shell. This means that the first three shells each have as many electrons as they can hold, and the fourth shell has one lonely electron. (The fourth shell can hold up to 32 electrons.)
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This tells us that each subshell has double the electrons per orbital. The s subshell has 1 orbital that can hold up to 2 electrons, the p subshell has 3 orbitals that can hold up to 6 electrons, the d subshell has 5 orbitals that hold up to 10 electrons, and the f subshell has 7 orbitals with 14 electrons.
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If Hydrogen has 1 electron it can only have 1 outer shell (or orbital) as an electron cannot by split across shells. In general, the first shell can hold 2 electrons, the second can hold 8. Consequently, hydrogen only has 1 outer shell as it has less than 2 electrons so it does not need another shell.
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In general, the first shell can hold 2 electrons, the second can hold 8. Consequently, hydrogen only has 1 outer shell as it has less than 2 electrons so it does not need another shell.
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Also, sixteen electrons will be present in the sub-shells having ms value of +1/2 for n = 4. How satisfied are you with the answer?
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Mo and few others are exceptions to the how to fill up the shells. in the ADA case. there is only 2 unpaired electrons.
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The total number of "shared" electrons equals eight, filling carbon's valence shell. The nitrogen's "shared electron" count is six, which means that it needs two more electrons to fill its shell which is accounted for by the lone pair.
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Answer Expert Verified Then, the number outer-shell d electrons is 4.