1 NaCl has a Δ EN of 2.1. What sort of bond does it form (89.0K)A) mostly ionic B) polar covalent C) covalent D) metallic 2 Which period of elements would you expect to most strongly experience the shielding effect? (53.0K)A) period 2 B) period 3 C) period 4 D) period 5 3 What is the structure of an ammonia molecule? (41.0K)A) triangle B) triangular pyrimid C) tetrahedron D) quadrilateral 4 Ethyne is different from ethane in what way? (40.0K)A) In ethyne, double bonds form between the hydrogen atoms. B) In ethyne, a double bond forms between the carbon atoms. C) In ethyne, a double bond forms between the carbon atom and one hydrogen atom. D) In ethyne, a triple bond forms between the carbon atoms. 5 __________ is the measure of an atom's ability to attract electrons in a bond.A) electronegativity B) ionic radius C) melting point D) shielding 6 __________ sharing of electrons results in ionic bonding.A) Electronegative B) Equal C) Highly unequal D) Slightly unequal 7 In general, __________ are malleable and ductile.A) metals B) nonmetals C) metalloids D) noble gases 8 A chemical bond that results from a shared pool of valence electrons is called a __________ bond.A) metallic B) ionic C) polar covalent D) directional 9 When strontium atoms react with oxygen atoms, they form __________ bonds.A) ionic B) covalent C) polar covalent D) triple 10 In general, electronegativity __________ atomic number within a period.A) increases with B) remains constant C) decreases with D) is inversely proportional to 11 In ethyne, the carbon atoms share __________ pair(s) of electrons.A) one B) two C) three D) four 12 The type of analysis based on the movements of a stationary phase and a mobile phase is called __________.A) chromatography B) photography C) titration D) phase movement 13 The boiling point of methane, CH4 , is __________ than that of water.A) much lower B) slightly higher C) much higher D) slightly lower 14 The CCl4 molecule is __________.A) linear and nonpolar B) octahedral and polar C) tetrahedral and nonpolar D) tetrahedral and polar 15 In general, electronegativity __________ increasing atomic number within a period.A) decreases with B) increases with C) ins inversely proportional to D) remains constant with