“Expanded octet” refers to the Lewis structures where the central atom ends up with more than an octet, such as in PCl 5 or XeF 4. In drawing the Lewis structure for PCl 5 , there is a total of 40 valence electrons to put in (5 + 5x7 = 40). One can easily see that if the central atom, P, is to be joined to five

As a result, oxygen can hold no more than eight valence electrons, which it gets when it forms OF2. The valence orbitals of sulfur are in the n = 3 shell and includes empty d orbitals that can be used to expand its valence shell. Sulfur has 10 valence electrons in forming SF4 and 12 valence electrons to form SF6 (sp3d2 hybrid orbitals). Nov 12, 2019 · Part a which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell to accommodate more than eight electrons? he h f b s Asked By adminstaff @ 11/12/2019 06:50 PM

Expert Answer. Answer: sulphur S The elements which have vacant orbitals in the valence shell can expand to accommodat view the full answer. number of valence electrons in an atom of the element or eight minus number of electrons in the valence shell of an atom. Know the Facts In the modern periodic table, l Elements are arranged in order of increasing atomic number. l The vertical columns of elements with similar properties are called groups. l The horizontal rows are called periods.

The third violation to the octet rule is found in those compounds with more than eight electrons assigned to their valence shell. These are called expanded valence shell molecules . Such compounds are formed only by central atoms in the third row of the periodic table or beyond that have empty d orbitals in their valence shells that can ... Jan 10, 2016 · As a consequence of this, the maximum covalency of the first member of each group is 4 (e.g., boron can only form [BF4 ]− , whereas the other members of the groups can expand their valence shell to accommodate more than four pairs of electrons e.g., aluminium forms [AlF6 ]3- .

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There is some periodicity in valence, for example, among representative elements, the valence is either equal to the number of electrons in the outermost orbitals or eight minus this number. Jan 10, 2016 · As a consequence of this, the maximum covalency of the first member of each group is 4 (e.g., boron can only form [BF4 ]− , whereas the other members of the groups can expand their valence shell to accommodate more than four pairs of electrons e.g., aluminium forms [AlF6 ]3- .

The next orbital we will examine is more complicated than the s orbital, it is known as the p orbital. p orbitals can have three possible orientations each of which is perpendicular to the two others in three-dimensional space (Figure 2), and each of the p orbitals can contain a maximum of two electrons, for a total of six electrons. An atom like phosphorus or sulfur which has more than an octet is said to have expanded its valence shell. This can only occur when the valence shell has enough orbitals to accommodate the extra electrons. For example, in the case of phosphorus, the valence shell has a principal

Four electrons in outer (valence) shell ; Tend to share these four electrons to form covalent compounds ; Carbon can form an unlimited number of compounds. Most compounds in living things contain carbon. Carbon makes up graphite,an excellent lubricant. Siliconis a major part of many minerals. 31 Nitrogen Group. Five electrons in their outer ... Sodium is much more apt to exist as a cation than is chlorine. This is because ____. A) chlorine is bigger than sodium B) chlorine is a gas and sodium is a solid C) chlorine has a greater ionization energy than sodium does D) chlorine is more metallic than sodium E) chlorine has a greater electron affinity than sodium does Page Ref: Sec. 7.4

when more than one valid Lewis structure can be written for a particular molecule; the actual structure of the molecule is an “average” of its resonance structures B. Formal Charge – the difference between the number of valence electrons on the free atom and the number of valence electrons assigned to the atom in the molecule. · Expanded octet: Any element in period 3 and greater can hold more than eight electrons, including phosphorus (10), sulfur (12), chlorine (14), and many others. · Odd numbers of electrons : Any molecule with an odd number of valence electrons cannot distribute those electrons to give eight to each atom; for example, nitric oxide (NO) has ... Answer: Br can expand its valence shell to accommodate more than eight electrons. Explanation: In a bond, elements tends to accommodate their valence electrons to reach the configuration of a noble gas (The Octet rule), so they try to complete their valence shell with 8 electrons, and they can do that only if they use the orbitals s (may contain only 2 electrons) and p (may contain only 6 ... The electron configuration can be visualized as the core electrons, equivalent to the noble gas of the preceding period, and the valence electrons: each element in a period differs only by the last few subshells. Phosphorus, for instance, is in the third period.

The spin quantum number m s, describe the orientation in space of a particular electron, an orbital may accommodate no more than two electrons. The table with the new quantum number’s set, based on Janet table shape and the new notation scheme with all the necessary values and the real electron configuration order, below is presented. Sep 14, 2013 · We know that a shell can accommodate a maximum of 2n2 electrons because a shell can have a maximum of n2 orbitals depending upon the value of n, i.e n=1 for K shell, n=2 for L shell, n=3 for M shell, n=4 for N shell and so on. According to Lewis, he pictured the atom in terms of a positively... EXCEPTION 1: FEWER THAN 8 ELECTRONS •Therefore, structures that put a double bond between boron and fluorine are much less important than the one that leaves boron with only 6 valence electrons. EXCEPTION 2: MORE THAN 8 ELECTRONS •The only way PF 5 can exist is if phosphorus has 10 electrons around the center Sulfur, for example, has the electron configuration [Ne]3s 2 3p 4 and therefore six valence electrons. Its Lewis symbol is. The dots are placed on the four sides of the symbol—top, bottom, left, and right—and each side can accommodate up to two electrons. Some molecules can accommodate more than 8 valence electrons because they have expanded valence shells. These molecules are from periods 3 or higher because starting from n=3, atoms have d-orbitals that can accommodate for more that 9 valence electrons. Unlike atoms from periods one and two that only have the s and p orbitals (total of 8 ...EXCEPTION 1: FEWER THAN 8 ELECTRONS •Therefore, structures that put a double bond between boron and fluorine are much less important than the one that leaves boron with only 6 valence electrons. EXCEPTION 2: MORE THAN 8 ELECTRONS •The only way PF 5 can exist is if phosphorus has 10 electrons around the center