Interpretation:
A structure for lithium aluminum hydride should be determined.
Concept Introduction:
During the formation of a compound each atom tends to lose, gain or share enough electrons to achieve an electronic configuration having eight valence electrons. This rule is also known as octet rule. The number of electrons present in outermost shell of an atom which are available for bonding are known as valence electrons. For a molecule, total number of valence electrons will be sum of valence electrons of each atom present in the molecule. Bond angles in the molecules can be predicted by using valence shell electron pair repulsion (VSEPR) model. According to this model, the valence electrons of an atom are involved in the formation of single, double or triple bond. The valence electrons can also be unshared and exist as lone pair on atoms. The combination forms a negatively charged region of electron density around a nucleus. Since, like charges do not attract, the region of electron density around a nucleus spread out so that each atom is as far away from each other at different angles.
Want to see the full answer?
Check out a sample textbook solutionChapter 3 Solutions
Introduction to General, Organic and Biochemistry
- 3-119 Perchloroethylene, which is a liquid at room temperature, is one of the most widely used solvents for commercial dry cleaning. It is sold for this purpose under several trade names, including Perciene®. Does this molecule have polar bonds? Is it a polar molecule? Does it have a dipole?arrow_forward3-63 What is the difference between (a) a bromine atom, (b) a bromine molecule, and (c) a bromide ion? Draw the Lewis structure for each.arrow_forward3-41 Describe the structure of sodium chloride in the solid state.arrow_forward
- 3-25 Why are carbon and silicon reluctant to form ionic bonds?arrow_forward3-110 Name and write the formula for the fluorine containing compound present in fluoridated tooth pastes and dental gels.arrow_forward2-98 Explain how the ionization energy of atoms changes when proceeding down a group of the Periodic Table and explain why this change occurs.arrow_forward
- 3-120 Vinyl chloride is the starting material for the production of poly(vinyl chloride), abbreviated PVC. Its recycling code is “V”. The major use of PVC is for tubing in residential and commercial construction (Section 12-7). (a) Complete the Lewis structure for vinyl chloride by showing all unshared pairs of electrons. (b) Predict the HCH, HCC, and ClCH bond angles in this molecule. (c) Does vinyl chloride have polar bonds? Is it a polar molecule? Does it have a dipole?arrow_forward3-121 Tetrafluoroethylene is the starting material for the production of poly(tetrafluoroethylene), PTFE, a polymer that is widely used for the preparation of nonstick coatings on kitchenware (Section 12-7). The most widely known trade name for this product is Teflon®. (a) Complete the Lewis structure for tetrafluoroeth ylene by showing all unshared pairs of electrons. (b) Predict the FCF and FCC bond angles in this molecule. (c) Does tetrafluoroethylene have polar bonds? Is it a polar molecule? Does it have a dipole?arrow_forward3-22 Why is Li- not a stable ion?arrow_forward
- 3-78 Nitrous oxide, N20, laughing gas, is a colorless, nontoxic, tasteless, and odorless gas. It is used as an inhalation anesthetic in dental and other surgeries. Because nitrous oxide is soluble in vegetable oils (fats), it is used commercially as a propellant in whipped toppings Nitrous oxide dissolves in fats. The gas is added under pressure to cans of whipped topping. When the valve is opened, the gas expands, thus expanding (whipping) the topping and forcing it out of the can. (a) How many valence electrons are present in a molecule of N20? (b) Write two equivalent contributing structures for this molecule. The connectivity in nitrous oxide is NNO. (c) Explain why the following is not an acceptable contributing structure:arrow_forward3-109 Until several years ago, the two chlorofluorocarbons (CFCs) most widely used as heat transfer media in refrigeration systems were Freon-li (trichloro fluoromethane, CC13F) and Freon-12 (dichiorodi fluoromethane, CCl2F2). Draw a three-dimensional representation of each molecule and indicate the Direction of it.s polarity.arrow_forward
- Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning