9 Revision

Molecular substances tend to melt and boil at ____________temperatures than ionic compounds or metals a. higher c. lower b. larger d. same

Metals tend to have ___________ melting points and boiling points. a. high c. the same b. low d. none of the abov

Identify whether the CO compound is polar, nonpolar, or ionic Notice that the electronegativity trends for the elements are: C: 2.55 O: 3.44 a. polar c. ionic b. non polar d. all of the above

A _________ ________bond is a bond in which electrons are shared but not shared equally between the atoms a. polar covalent c. ionic b. non polar covalent d. non of the above

. __________bonding is modeled as a sea of electrons. a. ionic c. covalent b. metallic d. hydroge

Hydrogen is an exception to the octet rule because it needs_______ electrons to achieve a stable electron configuration. a. 2 c. 8 b. 6 d. 1

In the periodic table, values of electronegativity tend to _________ from bottom to top within a group. a. increase c. stay the same b. decrease d. all of the above

Atoms of _________ form covalent bonds to become more stable by achieving the electron configuration of a noble gas. They share electrons. a. noble gases c. metals b. metalloids d. nonmetals

Hydrogen bonds are the ________ of all the intermolecular forces a. strongest c. most stable b. lowest d. all of the above

Atoms of nonmetals form covalent bonds to become more stable by achieving the electron configuration of noble gas. They _______ electrons a. gain c. transfer b. lose d. shar

Nonmetal atoms _________ some or all of their valence electrons to form a covalent bond. a. transfer c. share b. lose d. keep on

The weakest of all molecular interactions is ______________ a. Hydrogen bond c. Dispersion force b. Ionic bond d. Metallic bond

The intermolecular attractions between H2O molecules are a. Dispersion forces c. Hydrogen bond b. dipole interactions d. metallic bond

Which of the following chemical substances has a triple covalent bond? a. carbon dioxide (CO2) c. carbon monoxide (CO) b. oxygen (O2) d. water (H2O

The electrostatic attraction between the positive gold cations and the surrounding sea of electrons that holds gold atoms together is a. ionic bond c. covalent bond b. metallic bond d. intermolecular attraction

identify the molecule by which its geometry cancels out the polarity of different bonds to make the molecule nonpolar. a. SCl2 c. CO2 b. H2O d. H2

____________ are intermolecular attractions between oppositely charged regions of polar molecules. a. dipole interactions c. hydrogen bond b. dispersion forces d. covalent bond

Metals can conduct electricity because their valence electrons are a. non-mobile c. delocalized b. fixed d. all of the above

The weakest types of attraction between molecules, including dispersion forces and dipole interactions are called _____________ a. covalent bond c. metallic bond b. ionic bond d. Van der Waals force

A metallic bond is the electrostatic attraction between the free-moving. mvalence electrons and the ______________ metal cations. a. positively charged c. neutral b. negatively charged d. none of the above

The molecules made up of three atoms have a bent or linear shape, this depends on the molecule’s______________ a. polarity c. electron affinity b. electronegativity d. Ionization energ

A ____________ is the electrostatic attraction between the free-moving valence electrons and the positively charged metal cations. a. Metallic Bond c. Ionic Bond b. Covalent Bond d. intermolecular Attraction

Identify whether the compound Br2 is polar, nonpolar, or ionic Notice that the electronegativity trends for the elements are: Br: 2.96 a. polar c. ionic b. non-polar d. all of the above

The number of electrons needed to apply the octet rule a. Valence electrons – core electrons c. 8- core electrons b. Valence electrons – needed electrons d. 8 –valence electrons

Which of the following statements about metals is false? a. Metals can be drawn into wires. b. Metals have low melting and boiling points. c. Metals can be hammered into different shapes. d. Metals in solid form have specific crystal struct

is a bond made by three bonding pairs of electrons. a. single covalent bond c. triple covalent bond b. double covalent bond d. polar covalent bond

The melting and boiling points of magnesium are higher than those of sodium because the electrostatic attraction between magnesium cations and the sea of electrons is much __________ than it is in sodium. a. weaker c. smaller b. stronger

__________ is a measure of how easily a liquid evaporates. a. electronegativity c. ionization energy b. electron affinity d. volatility

Malleability: a. Metals are soluble c. Metals can be hammered into shapes b. metals can conduct electricity d. metals can be drawn into wires

Metallic bonding modeled as a sea of _________ a. cations c. electrons b. anions d. none of the above

____________ are intermolecular forces in which hydrogen is covalently bonded to a very electronegative atom. a. Van der Waals forces c. Hydrogen bonds b. Dispersion forces d. Dipole interaction

A __________ is a neutral group of atoms held together by one or more covalent bonds. a. ionic compound c. molecule b. metal d. none of the above

Which of the following statements about covalent bonds is false? a. Covalent bonds can be single, double, or triple bonds. b. Covalent bonds hold the atoms together in discrete molecules. c. Covalent bonds form when atoms of nonmetals are

_________________ show how atoms share electrons to meet the octet rule a. sea of electrons c. electron dot structure b. Bohr Model d. none of the above

A _______________bond is a bond in which the electrons are shared equally a. polar covalent c. ionic b. non polar covalent d. metallic

The stronger the intermolecular forces, the _______ volatility. a. Higher c. Same b. lower d. None of the above