Chemical Bonding - Test

Master chemical bonding! Practice ionic, covalent, VSEPR theory & more.

Match the following an electron in the highest occupied energy level of an atom valence electron Atoms react so as to acquire the stable electron structure of a noble gas. octet rule a depiction of valence electrons around the symbol of an element Lewis dot structure the force of attraction binding oppositely charged ions together ionic bond a covalent bond in which only one pair of electrons is shared a single covalent bond Match the following atom or group of atoms having a negative charge anion atom or group of atoms having a positive charge cation tightly-bound group of atoms that behaves as a unit and carries a net charge Polyatomic ion compound composed of two different elements binary ionic compound shapes adjust so valence-electron pairs are as far apart as possible VSEPR theory How many valence electrons are in an atom of phosphorus? 2 3 4 5 How does calcium obey the octet rule when reacting to form compounds? It gains electrons It gives up electrons Calcium does not obey the Octet rule It does not change the number of electrons How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration? 1 2 3 4 What is the charge on the cation in the ionic compound sodium sulfide? 0 +1 +2 +3 What is the net charge of the ionic compound calcium fluoride? 2- 1- 0 +1 Which of the following is true about an ionic compound? Its a salt It is held together by ionic bonds. It is composed of anions and cations. All of the above What is the chemical formula of sodium nitride? NaN Na2N Na3N NaN3 What is the formula unit of aluminum oxide? AlO Al3O AlO3 Al2O3 What is the formula for sodium sulfate? NaSO4 Na2SO4 Na(SO4)2 Na2(SO4)2 Ionic compounds are normally in which physical state at room temperature? solid liquid gas plasma Which of the following is true about the melting temperature of potassium chloride? The melting temperature is relatively high. The melting temperature is variable and unpredictable. The melting temperature is relatively low. Potassium chloride does not melt at any temperature Which of the following elements can form diatomic molecules held together by triple covalent bonds? carbon oxygen fluorine nitrogen Which elements can form diatomic molecules joined by a single covalent bond? hydrogen only halogens only halogens and members of the oxygen group only hydrogen and the halogens only Which of the following is the name given to the pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules? unvalenced pair outer pair inner pair unshared pair The shape of the methane (CH4) molecule is called _. tetrahedral square four cornered planar What causes water molecules to have a bent shape, according to VSEPR theory? repulsive forces between unshared pairs of electrons interaction between the fixed orbitals of the unshared pairs of oxygen ionic attraction and repulsion the unusual location of the free electrons Which of the following covalent bonds is the most polar? H-F H-H H-C H-N In which of the following are the symbol and name for the ion given correctly? NH4+: ammonia; H+: hydride OH-: hydroxide; O2-: oxide C2H3O2-: acetate; C2O4- : oxalite PO33-: phosphate; PO43-: phosphite An -ate or -ite at the end of a compound name usually indicates that the compound contains _. fewer electrons than protons neutral molecules only two elements a polyatomic anion Which of the following compounds contains the Mn3+ion? MnS MnBr2 Mn2O3 MnO In which of the following is the name and formula given correctly? sodium oxide, NaO barium nitride, BaN cobalt (II) chloride, CoCl3 Tin (IV) fluoride, SnF4 Which set of chemical name and chemical formula for the same compound is correct? iron(II) oxide, Fe2O3 aluminum fluorate, AlF3 tin(IV) bromide, SnBr4 potassium chloride, K2Cl2 Which set of chemical name and chemical formula for the same compound is correct? ammonium sulfite, (NH4)2S iron(III) phosphate, FePO4 lithium carbonate, LiCO3 magnesium dichromate, MgCrO4 Consider a mystery compound having the formula MxTy. If the compound is not an acid, if it contains only two elements, and if M is not a metal, which of the following is true about the compound? It contains a polyatomic ion. Its name ends in -ite or -ate. Its name ends in -ic. It is a binary molecular compound. Which of the following shows both the correct formula and correct name of an acid? HClO2, chloric acid HNO2, hydronitrous acid H3PO4, phosphoric acid HI, iodic acid What is the name of H2SO3? hyposulfuric acid sulfuric acid hydrosulfuric acid sulfurous acid Select the correct formula for sulfur hexafluoride. S2F6 F6SO3 F6S2 SF6 What is the correct formula for barium chlorate? Ba(ClO)2 Ba(ClO2)2 Ba(ClO3)2 BaCl2 Which of the following is the correct name for N2O5? nitrous oxide dinitrogen pentoxide nitrogen dioxide nitrate oxide