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BONDING REVIEW You need a Periodic Table, Electronegativity table & Polarity chart! What is the correct bond angle for “Bent” – with 2 lone pairs on the central atom? 105 What is the predicted bond angle for the following compound? 109.5 Write the electron dot notation for sulfur. S How many valence electrons does CO3-2have? 24 When predicting bond types, list the range for ionic. 1.7 and higher What type of melting & boiling points do molecular compounds have? Low melting & boiling points Are the IM forces (strong or weak) in ionic compounds? Strong Where are valance electrons found? Outermost energy level What is an isomer? Compounds with the same molecular formula, but different structural formulas ______ is the measure of the ability of an atom to attract electrons. Electronegativity A(n) __________ compound requires less energy (lower temp.) to break weak IM forces between particles Molecular A single bond is a covalent bond produced by the sharing of _____pair of electrons between two atoms one Assign partial charges for the following pair of atoms: N and O N-O Note: O gets the – b/c it has a higher electronegativity value! _______ are forces of attraction between adjacent particles (molecules, atoms, or ions) Intermolecular Forces What is the predicted bond angle for the following compound? 180 What is the molecular geometry of the following?: Trigonal planar A chemical bond resulting from electrostatic attraction between positive and negative ions is a(n) _______ IONIC BOND What is the predicted bond angle for the following compound? 120 What is the probable bond type for K and F? 0.8-4.0 = 3.2 difference so it’s IONIC What is the correct bond angle for “tetrahedral”? 109.5 How many valence electrons does NH4+1have? 8 Are the IM forces (strong or weak) in molecular compounds? Weak How many electrons does hydrogen need in order to be considered stable? 2 ________ is a covalent bond in which the bonding electrons are shared equally by the bonded atoms NONPOLAR covalent What are the following considered?: H2, O2, N2, Cl2, Br2, I2, and F2 naturally occurring Diatomic molecules What is the predicted bond angle for the following compound? 120 MgF2 What is the ratio between the ions? 1Mg : 2 F A triple bond is a covalent bond produced by the sharing of _____pairs of electrons between two atoms THREE What is the molecular geometry of the following?: Tetrahedral When predicting bond types, list the range for polar covalent. 0.3-1.7 What is the molecular geometry of the following?: Linear A - is assigned to the atom with the _______electronegativity Highest Ionic compounds contain what type(s) of element(s)? Metals and nonmetals A(n) __________ compound requires more energy (higher temp.) to break strong IM forces between particles Ionic What phase(s) of matter would you most likely find ionic compounds? SOLIDS ________ is the simplest collection of atoms from which an ionic compound’s formula can be established Formula unit What is the molecular geometry of the following: Trigonal pyramidal What is the correct bond angle for “Bent” – with 1 lone pair on the central atom? 120 Molecular substances usually involve only what type of elements? NONMETALS What type of melting & boiling points do ionic compounds have? High melting & boiling points Chemical compounds tend to form so that each atom (by gaining, losing, or sharing electrons) contains eight electrons in its outermost occupied main energy level is known as the _______________ Octet Rule Write the electron dot notation for lithium. Li What is the predicted bond angle for the following compound? 105 What type of bond is illustrated in the picture? Polar Covalent Bond + - __________are electrons involved in bonding. VALANCE Electrons _______ is a neutral group of atoms held together by covalent bonds Molecule What is the correct bond angle for “trigonal pyramidal”? 107 What is the probable bond type for H and C? 2.1-2.5 = 0.4 difference so it’s POLAR COVALENT ______ is a molecule containing only two atoms Diatomic molecule What is the correct bond angle for “trigonal planar”? 120 _____ is an electron pair NOT involved in bonding Lone pair What is the molecular geometry of the following?: Bent ______ is an electron pair involved in bonding Bond pair A double bond is a covalent bond produced by the sharing of _____pairs of electrons between two atoms TWO List the 3 elements that are exceptions to the octet rule. H, Be, B What phase(S) of matter would you find molecular substances? Solids, liquids, gases What two items needs to be added to the electron dot/structural formulas for polyatomic ions? Bracket Charge What is the predicted bond angle for the following compound? 107 When predicting bond types, list the range for nonpolar covalent. 0-0.3 What is the correct bond angle for “linear”? 180 _________ is a covalent bond in which the bonding electrons are shared unequally by the bonded atoms POLAR covalent What is the probable bond type for H and H? 2.1-2.1= 0 difference so it’s NONPOLAR COVALENT A chemical bond resulting from the sharing of electrons between two atoms is _______ Covalent Bond What type of bond is illustrated in the picture? Nonpolar Covalent Bond Use electron-dot formulas to illustrate the formation of ionic bonds involving Ca and F. Ca + F + F Ca+2 + F-1 + F-1 CaF2 Is this molecule Polar or Nonpolar? Cl2O You need to use your polarity chart! Polar Is this molecule Polar or Nonpolar? NCl3 You need to use your polarity chart! Nonpolar
