Final EOC Review - Sheet 2

1) When an ionic bond is formed, the atom that transfers its 15) Which of the following is not a polar molecule?

valence electron is the atom that has the a) HF b) H2O c) NH3 d) CH4

a) higher electro negativity value

b) lower atomic number 16) Which statement best explains why carbon tetrachloride

c) higher atomic mass (CCl4) is non-polar?

d) lower ionization energy a) Each carbon-chloride bond is polar.

b) Carbon and chlorine are both nonmetals.

2) What type of bond is found in copper metal? c) Carbon tetrachloride is an organic compound.

a) Ionic b) Covalent c) Metallic d) polar d) The carbon tetrachloride molecule is symmetrical.

3) In potassium hydrogen carbonate, KHCO3,the bonds are 17) The weakest attractive forces exist between molecules of

a) ionic, only c) covalent, only a) C2H6 b) C3H8 c) C4H10 d) C5H12 b) both ionic & covalent d) both covalent & metallic 18) Hydrogen bonds are strongest between molecules of 4) When potassium and chlorine form a chemical compound, a) HF(l) b) HCl(l) c) HBr(l) d) HI(l) energy is a) released and ionic bonds are formed 19) The process in which water molecules surround ions in b) released and covalent bonds are formed solution is called absorbed and ionic bonds are formed c) a) van der Waals forces c) hydration absorbed and covalent bonds are formed d) b) hydrogen bonding d) dipole bonding

5) Which substance, in its solid phase, contains positive ions 20) Which compound has the empirical formula P2O5? distributed in a diffuse cloud of electrons? a) potassium (II) oxide c) potassium (V) oxide N b) C c) Mg d) CO a) 2 2 b) phosphorus (II) oxide d) phosphorus (V) oxide

6) If a pure substance is a good conductor of electricity in 21) What is the name for the compound with the formula both its solid and its liquid phases, the bonding in the NH4NO2? substance is predominantly a) ammonium nitride c) ammonium nitrite Ionic c) Metallic a) b) ammonia nitrate d) ammonium nitrate b) polar covalent d) non-polar covalent 22) What is the formula of potassium hydride? 7) Which compound best illustrates ionic bonding? a) KH b) KH2 c) KOH d) K(OH)2 CCl4 b) MgCl2 c) H2O d) CO2 23) Which represents both an empirical and a molecular formula? 8) Which type of solid generally has the lowest melting point? a) P4O10 b) NO2 c) C3H6 d) C6H12O6 a) Molecular b) Metallic c) Ionic d) Network 24) Which is an empirical formula? 9) Which sample of HCl most readily conducts electricity? a) C2H2 b) C2H4 c) Al2Cl6 d) K2O a) HCl (solid) c) HCl (liquid) b) HCl (gas) d) HCl (aqueous) 25) If a pure substance is hard, a poor conductor of heat and electricity, and has a high melting point it is most likely 10) An atom that loses or gains electrons becomes a) a metal c) a network solid a) an ion c) an isotope b) an ionic solid d) a polar covalent compound b) a molecule d) an electrolyte 26) The elements in the modern Periodic Table are arranged in 11) Which kind of bond is formed when two atoms share order of increasing electrons to form a molecule? a) atomic number c) atomic mass a) Ionic b) Metallic c) Electrovalent d) Covalent b) ionic radius d) oxidation state

12) Which molecule contains a non-polar covalent bond? 27) Which of the following has the highest first ionization energy?

a) Li b) Na c) K d) Rb

28) Which of the following is the most active metal?

a) Carbon b) Boron c) Beryllium d) lithium

29) Which is a chemically active nonmetal? 13) What accounts for the stability of the noble gas electron F b) Na c) Si d) Kr configuration? a) presence of 8 electrons in the outer energy level a) 30) Within a period, the element with the lowest first ionization equal charge of protons and electrons b) energy is found in Group c) diffusion of electrons to all energy levels a) 1 b) 14 c) 17 d) 18 d) equal number of electrons in the outermost and innermost energy levels 31) Atoms of which of the following elements have the greatest tendency to gain electrons? 14) Why is NH3 classified as polar molecule? a) Phosphorus c) Carbon a) It is a gas at STP b) Chlorine d) Boron b) N-H bonds are non-polar

c) Nitrogen and hydrogen are both nonmetals.

d) NH3 molecules have asymmetrical charge distributions. Final EOC Review - Sheet 2

32) The increase in atomic radius of each successive element 46) One reason that fluorine has a higher ionization energy than within a group is primarily due to an increase in the oxygen is that fluorine has a

number of a) smaller nuclear charge

a) neutrons in the nucleus b) larger nuclear charge

b) electrons in the outermost shell c) smaller number of neutrons

c) unpaired electrons d) greater number of neutrons

d) occupied principal energy levels 47) Which property applies to most nonmetals in the solid state?

33) Elements that have properties of both metals and a) Brittle c) good conductors of electricity

nonmetals are called b) Malleable d) good conductors of heat

a) alkali metals c) metalloids

b) transition elementsd) halogens 48) Which is most closely followed as one goes down the Periodic Table with Group 1 elements?

34) According to the modern periodic law, the chemical a) increasing metallic activity and increasing atomic radius

properties of elements are periodic functions of their b) increasing metallic activity and decreasing atomic radius

a) ionic charges c) oxidation states c) decreasing metallic activity and increasing atomic radius

b) atomic numbers d) mass numbers d) decreasing metallic activity and decreasing atomic radius

35) Which pair of properties is most closely associated with 49) Which is formed when the first ionization energy is applied to nonmetals? an atom?

a) low ionization energy & good electrical conductivity a) an ion with negative charge

b) high ionization energy & poor electrical conductivity b) an ion with positive charge

c) low ionization energy & poor electrical conductivity c) an ion with either positive or negative charge

d) high ionization energy & good electrical conductivity. d) two ions, one with positive charge, one with negative charge 36) Which of the following elements has the most metallic character? 50) Which class includes the greatest number of chemical

a) Bromine c) Chlorine elements?

b) Fluorine d) Iodine a) Metalloids c) Metals

b) noble gases d) nonmetals 37) Which element exhibits both metallic and nonmetallic properties? 51) Within a group, as atomic number increases, electro-

a) boron b) barium c) potassium d) argon negativity generally

a) Increases

38) Which of the following fifth-period elements is most likely b) Decreases

to be malleable? c) remains the same

a) 48Cd b) 52Te c) 53I d) 54Xe 52) Within a group, as atomic radius increases, ionization energy 39) Which period contains three elements that commonly exist generally

as diatomic molecules at ordinary conditions? a) Increases b) Decreases c) stays the same

a) Period 1 b) Period 2 c) Period 6 d) Period 7 53) Which of the following pairs exhibits the most similar chemical 40) Elements in the same period have the same number of properties?

a) Protons c) Valence electrons a) Mg and S c) Ca and Br

b) Neutrons d) Occupied principal energy levels b) Mg and Ca d) S and Cl

41) Within a period, as atomic number increases, ionization 54) Which group contains the most active nonmetals?

energy generally a) 1 (2) 13 (3) 15 (4) 17

a) Increases b) Decreases c) Remains the same 55) Which group of elements usually forms oxides with the

42) As the elements of Period 2 are considered from left to general formula X2O3?

right, there is a decrease in a) 3 b) 2 c) 13 d) 14 .

a) ionization energy c) Atomic mass

b) metallic character d) Nonmetallic character 56) A white anhydrous (dry) powder that dissolves in water to form a blue aqueous solution is most likely to be

43) Which element is a member of the halogen family? a) Na2S04 b) BaSO4 c) CuSO4 d)CaSO4

a) K b) B c) I d) S 57) Which symbol represents an alkaline earth metal? 2- 2- 44) The S ion differs from the S° atom in that the S ion has a) Na b) Mg c) Ne d ) Ag

a) smaller radius and fewer electrons

b) smaller radius and more electrons 58) If X represents an element from Group 1, the formula of its

c) larger radius and fewer electrons oxide is

d) larger radius and more electrons a) XO b) X2O c) XO2 d) X2O3

45) Which element occurs in nature only in compounds? 59) Which of the following noble gases has the lowest normal

a) Au b) Na c) Ne d) Ag boiling point?

a) Ne b) Ar c) Kr d) Xe