1) In a covalent bond a) atoms share pairs of electrons b) positive ions have an electrostatic attraction to delocalised electrons c) positive ions and negative ions have an electrostatic attraction d) atoms are monoatomic 2) In a metallic bond a) atoms share pairs of electrons b) positive ions have an electrostatic attraction to delocalised electrons c) positive ions and negative ions have an electrostatic attraction d) atoms are monoatomic 3) In an ionic bond a) atoms share pairs of electrons b) positive ions have an electrostatic attraction to delocalised electrons c) positive ions and negative ions have an electrostatic attraction d) atoms are monoatomic 4) Polar covalent bonds are formed when a) the electronegativity of atoms in the bond is different b) the electronegativity of atoms in the bond is the same 5) Pure covalent bonds are formed when a) the electronegativity of atoms in the bond is different b) the electronegativity of atoms in the bond is the same 6) Ionic formulae is a) the simplest ratio of of each type of ion in the substance b) the simplest ratio of of each type of atom in the substance c) the number of ions in the substance d) the number of atoms in the substance 7) If a compound does not conduct when solid or liquid it is probably a) covalent b) ionic c) metallic 8) When a substance does not conduct when solid but does when liquid it is probably a) covalent b) ionic c) metallic 9) Covalent substances with high melting and boiling points are usually a) networks b) molecular 10) All atoms and compounds contain a) London dispersion forces b) Pd-Pd interactions c) hydrogen bonding 11) The more electrons in an atom or compound a) the greater the strength of LDFs b) the weaker the strength of LDFs 12) The correct order for the bonding continuum from weakest to strongest is a) LDF - Pd-Pd - H-bonding - polar covalent - pure covalent b) Pd-Pd - LDF - H-bonding - pure covalent - polar covalent c) H-bonding - Pd-Pd - LDF - polar covalent - pure covalent d) polar covalent - pure covalent - H-bonding - LDF - Pd-Pd 13) H-bonds only occur between molecules that have hydrogen bonded to a) nitrogen, oxygen and fluorine b) nitrogen, oxygen, carbon c) oxygen, fluorine, chlorine d) nitrogen, fluorine, chlorine 14) The stronger the intermolecular forces a) the more viscous b) the lower the boiling point c) the less viscous d) the less soluble 15) The anomalous boiling points of water, hydrogen fluoride and ammonia are a result of a) H-bonding b) Pd-Pd interactions c) LDFs

Higher Chemistry Unit 1: Structure and Bonding

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