Lewis Electron-Dot Formulas

فهرست عناوین اصلی در این پاورپوینت

فهرست عناوین اصلی در این پاورپوینت

● The Octet/Duet Rule
● Lewis Symbols
● Lewis Symbols for Ions
● Lewis Electron-Dot Formulas
● Electron Configurations of Ions
● Covalent Bonds
● Lewis Structures
● Coordinate Covalent Bonds
● Multiple Bonds
● Bond Length and Bond Order
● Polar Covalent Bonds
● Dipole Moment and Molecular Geometry
● Polar Covalent Bonds
● Writing Lewis Dot Formulas
● Writing Lewis Structures
● Delocalized Bonding: Resonance
● Formal Charge and Lewis Structures
● Bond Length and Bond Order
● Bond Energy

نوع زبان: انگلیسی حجم: 0.57 مگا بایت
نوع فایل: اسلاید پاورپوینت تعداد اسلایدها: 54 صفحه
سطح مطلب: نامشخص پسوند فایل: pptx
گروه موضوعی: زمان استخراج مطلب: 2019/06/15 11:32:37

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عبارات مهم استفاده شده در این مطلب

عبارات مهم استفاده شده در این مطلب

., electron, atom, h, bond, lewi, share, two, dot, pair, ion, valence,

توجه: این مطلب در تاریخ 2019/06/15 11:32:37 به صورت خودکار از فضای وب آشکار توسط موتور جستجوی پاورپوینت جمع آوری شده است و در صورت اعلام عدم رضایت تهیه کننده ی آن، طبق قوانین سایت از روی وب گاه حذف خواهد شد. این مطلب از وب سایت زیر استخراج شده است و مسئولیت انتشار آن با منبع اصلی است.

http://www.faculty.sfasu.edu/janusama/powerpoint/topic9.pptx

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عبارات پرتکرار و مهم در این اسلاید عبارتند از: ., electron, atom, h, bond, lewi, share, two, dot, pair, ion, valence,

مشاهده محتوای متنیِ این اسلاید ppt

مشاهده محتوای متنیِ این اسلاید ppt

topic ۹ chemical bonding and lewis structures the octet duet rule the chemical properties of atoms primarily depend on their valence configuration. they seem to have a tendency to be noble gas like meaning losing gaining or sharing electrons so that they end up being surrounded by the same number of valence electrons as noble gas atoms ۸ except he which has ۲ . the tendency of atoms in a molecule to have eight electrons in their outer shell two for hydrogen is called the octet duet rule. ۲ ۲ lewis symbols a lewis symbol is a symbol in which the electrons in the valence shell of an atom or ion are represented by dots placed around the letter symbol of the element. electrons are place singly on each side before they are paired. note that the group number on the traditional periodic table indicates the number of valence electrons. na . . . . . si . . . p s mg . . . al . . cl ar group i group ii group vii group viii group vi group iv group v group iii . . . . . . . . . . . . . . . . . . . . . . . ۳ ۲ lewis symbols for ions for ions dots are added or taken away depending on the charge square brackets are drawn and the charge is indicated in the upper right hand corner. by following the octet duet rule we can say that the atoms end up as ions with a noble gas like configuration or as being isoelectronic with a noble gas. the magnesium atom has two valence electrons its lewis symbol has two dots. naturally occurring magnesium ion has a charge of ۲ this means two fewer electrons compared to a magnesium atom. lewis symbol for magnesium ion has no dots and a ۲ charge. the fluorine atom has seven valence electrons its lewis symbol has seven dots. naturally occurring fluoride ion has a charge of ۱ this means one additional electron compared to a fluorine atom. lewis symbol for fluoride ion has ۸ dots and a ۱ charge. . . f . . . . . . mg ۲ ۴ ۲ lewis electron dot formulas a lewis electron dot formula is an illustration used to represent the transfer of electrons during the formation of an ionic bond. as an example let’s look at the transfer of electrons from magnesium to fluorine to form magnesium fluoride. ۵ there is a transfer of electrons from the metal to the nonmetal giving each species a complete octet. an ionic bond involves the attraction of oppositely charged ions for each other. ۲ lewis electron dot formulas consequently magnesium can accommodate two fluorine atoms. f . f . mg . . mg f ۲ f the magnesium has two electrons to give whereas the fluorines have only one vacancy each. hw ۶۴ ۶ code dot ۲ electron configurations of ions as metals lose electrons to form cations and establish a noble gas configuration octet the electrons are lost from the valence shell first. for example magnesium generally loses two electrons from its ۳s subshell to look like neon. ne ۳s۲ ne ۷ ۲ electron configurations of ions transition metals also lose electrons from the valence shell first which is not the last subshell to fill according to the aufbau sequence. for example zinc generally loses two electrons from its ۴s subshell to adopt a pseudo noble gas configuration. ar ۴s۲۳d۱ ar ۳d۱ ۸ ۲ covalent bonds when two nonmetals bond they often share electrons since they have similar attractions for them. this sharing of valence electrons is called a covalent bond. these atoms will share sufficient numbers of electrons in order to achieve a noble gas electron configuration octet duet rule . ۹ ۲ lewis structures you can represent the formation of the covalent bond in h۲ as follows h . . h h h this uses the lewis symbols for the hydrogen atom and represents the covalent bond by a pair of dots. to complete the duet for h each h atom shares their electron between them so that they both have a duet. ۱ ۲ lewis structures the shared electrons in h۲ spend part of the time in the region around each atom. in this sense each atom in h۲ has a helium configuration complete duet . h is found in nature as h۲ not h because this arrangement of sharing electrons is more stable. h h ۱۱ ۲ lewis structures the formation of a bond between h and cl to give an hcl molecule can be represented in a similar way. thus by sharing electrons hydrogen has two valence electrons about it as in he duet and cl has eight valence electrons about it as in ar octet . h cl h . . cl ۱۲ ۲e ۸e ۲ lewis structures formulas such as these are referred to as lewis electron dot formulas or lewis structures. h cl an electron pair is either a bonding pair shared between two atoms or a lone pair an electron pair that is not shared . bonding pair ۳ lone pairs ۱۳ ۲ coordinate covalent bonds when bonds form between atoms that both donate an electron you have covalent bond a . . b a b it is however possible that both electrons are donated by one of the atoms. this is called a coordinate covalent bond. a b a b ۱۴ ۲ multiple bonds in the molecules described so far each of the bonds has been a single bond that is a covalent bond in which a single pair of electrons is shared. it is possible to share more than one pair of electrons between atoms. due to the lack of available electrons atoms must share more than one pair of electrons to obtain an octet. a double bond involves the sharing of two pairs of electrons between atoms. in ethylene c۲h۴ there are only ۱۲ e available. for each h to have a duet and each c to have an octet by only using ۱۲ e the two c atoms must share ۴ e to make a double bond. or c c h h h h ۱۵ ۸e ۸e ۲e ۲e ۲e ۲e ۲ multiple bonds triple bonds are covalent bonds in which three pairs of electrons are shared between atoms. c c or h h ۱۶ in acetylene c۲h۲ there are only ۱ …

کلمات کلیدی پرکاربرد در این اسلاید پاورپوینت: ., electron, atom, h, bond, lewi, share, two, dot, pair, ion, valence,

این فایل پاورپوینت شامل 54 اسلاید و به زبان انگلیسی و حجم آن 0.57 مگا بایت است. نوع قالب فایل pptx بوده که با این لینک قابل دانلود است. این مطلب برگرفته از سایت زیر است و مسئولیت انتشار آن با منبع اصلی می باشد که در تاریخ 2019/06/15 11:32:37 استخراج شده است.

http://www.faculty.sfasu.edu/janusama/powerpoint/topic9.pptx

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