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Visit: Log in and select Chem 1A. When prompted, type the word of the day: learning Ensure when asked if you will share your location you select “allow”. Visit: Sign in MasteringChemistry account name When prompted, type session ID: Please turn off all downloads. You can usually pause them by clicking on them and clicking pause. Facebook and youtube are officially banned during class time (this is not me micromanaging, it’s a legit internet issue as told to me by OIT). Remember back 5 rows of even side are no seating zones

Lewis Structures: non-octet breaking BH 3 NH 3 Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Label each with the formal charge. B N 3+6(1)+5=14 H H H H H H 14 electrons, everything with an octet Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: non-octet breaking CH 2 O Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Label each with the formal charge. C H H O C H H O =12 Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

HNO 2 Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Label each with the formal charge. Lewis Structures: non-octet breaking 1+5+6*2=18e- N O O H We’d need 20 electrons to give everything octets: Add in a double bond Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: non-octet breaking N 2 O Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Label each with the formal charge. NNO 5(2)+6=16 electrons Short 4 electrons: need two more bonds Where do we add them? NNO NNO NNO 5-6 = =0 5-4=1 5-5 =0 6-7 =-1 5-4=1 5-7 =-2 5-4=1 6-5 =1 Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

OCTET BREAKING EXAMPLES Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Which of the following statements is true: A) Nitrogen is allowed to have five bonds because it is allowed to have eight electrons B) Phosphorous is allowed to have five bonds because it is allowed to have ten electrons C) Carbon can break the octet rule with greater than eight electrons. D) Iodine is a halogen so it can never have more than one bond. E) Xenon is a noble gas so it can’t form compounds Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: octet breaking BH 3 Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Is it one that is typically found to have less? Label each with the formal charge B H H H 3+1(3)=6 electrons Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: octet breaking XeF 4 Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Is it one that is typically found to have less? Label each with the formal charge 8+7(4)=36 electrons Xe FF FF Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: octet breaking ClF 4 - Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Is it one that is typically found to have less? Label each with the formal charge 7+7(4)+1=36 electrons Cl FF FF Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID:

Lewis Structures: octet breaking H 2 SO 4 Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed. No? Then add double bonds until you have enough electrons. Is it one that is typically found to have less? Label each with the formal charge 6(5)+2=32 electrons S O O O O H H S O O O O H H Visit: Word of the day: learning Ensure when asked if you will share your location you select “allow”. LearningCatalytics: session ID: