chem ch 2

8) An atom of 13C contains ________ protons. A) 6 B) 19 C) 7 D) 9 E) 13

A) 6

34) Semiconductors are A) metalloids. B) noble gases. C) nonmetals. D) metals.

A) metalloids.

The number 6.022 × 10^23 is called ________.

Avogadro's number

40) How many electrons are in the ion, S2-? A) 14 B) 18 C) 30 D) 34 E) 23

B) 18

18) How many electrons does the Se2- ion possess? A) 32 B) 36 C) 4 D) 0 E) 34

B) 36

23) Which element has the chemical symbol, Rn? A) radium B) radon C) rhenium D) rhodium

B) radon

22) What is the chemical symbol for carbon? A) Co B) Cr C) C D) Ca E) Cb

C) C

70) Which of the following elements is NOT a metal? A) Mg B) Na C) He D) Au E) Mn

C) He

63) Which of the following elements is NOT a solid at room temperature? A) Mn B) Cr C) Hg D) Mg E) Na

C) Hg

50) Which of the following elements is a halogen? A) Po B) S C) I D) Sn E) Kr

C) I

15) Isotopes differ in the number of A) gamma particles. B) electrons. C) compounds. D) neutrons. E) neutrons and protons.

D) neutrons.

45) What mass (in mg) does 2.63 moles of nickel have? A) 44.8 mg B) 2.23 × 10^4 mg C) 129 mg D) 3.56 × 10^5 mg E) 1.54 × 10^5 mg

E) 1.54 × 10^5 mg

9) An atom of 25Mg contains ________ electrons. A) 25 B) 37 C) 13 D) 23 E) 12

E) 12

4) Rutherford proposed the A) atomic bomb. B) hydroelectric. C) First Law of Conservation. D) theory of explosives. E) nuclear theory.

E) nuclear theory.

Give an example of an halogen.

F, Br, I, or Cl

1) magnesium 2) carbon 3) potassium 4) iron 5) silicon

Mg C K Fe Si

Why doesn't a mass spectrum of silver have a peak at 107.9 amu?

The average atomic mass of silver is 107.9 amu, but there are no atoms of silver that weigh 107.9 amu. One isotope weighs more and another weighs less.

Give the name of the instrument that is used to measure masses of atoms and the percent abundance of isotopes.

mass spectrometer

46) Predict the charge of the most stable ion of sodium. A) 1+ B) 3- C) 4+ D) 5+ E) 6+

A) 1+

45) Predict the charge that the ion formed from chlorine would have. A) 1- B) 2+ C) 1+ D) 4- E) 3-

A) 1-

41) Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the amu of the other isotope? A) 106.905 amu B) 106.908 amu C) 106.903 amu D) 106.911 amu

A) 106.905 amu

11) How many electrons are in each neutral atom of magnesium? A) 12 B) 13 C) 14 D) 12.3 E) 24.3

A) 12

29) How many protons (p) and neutrons (n) are in an atom of calcium-46? A) 20 p, 26 n B) 20 p, 46 n C) 26 p, 20 n D) 46 p, 20 n

A) 20 p, 26 n

39) How many electrons are in the ion, Ni2+? A) 26 B) 28 C) 30 D) 59 E) 52

A) 26

13) How many protons are in nickel? A) 28 B) 30 C) 31 D) 30.7 E) 58.7

A) 28

49) How many phosphorus atoms are contained in 158 kg of phosphorus? A) 3.07 × 10^27 phosphorus atoms B) 2.95 × 10^27 phosphorus atoms C) 3.25 × 10^28 phosphorus atoms D) 1.18 × 10^24 phosphorus atoms E) 8.47 × 10^24 phosphorus atoms

A) 3.07 × 10^27 phosphorus atoms

37) Give the number of electrons in K+. A) 36 B) 80 C) 35 D) 45 E) 48

A) 36

84) How many atoms are in 7.50 moles of Ca? A) 4.52 × 10^24 atoms B) 1.52 × 10^24 atoms C) 5.02 × 10^23 atoms D) 3.01 × 10^24 atoms E) 7.53 × 10^23 atoms

A) 4.52 × 10^24 atoms

92) How many argon atoms are contained in 7.66 ×10^5 mmol of argon? A) 4.61 × 10^26 Ar atoms B) 4.61 × 10^29 Ar atoms C) 3.83 × 10^26 Ar atoms D) 7.86 × 10^21 Ar atoms E) 3.24 × 10^26 Ar atoms

A) 4.61 × 10^26 Ar atoms

46) How many moles of Kr are contained in 398 mg of Kr? A) 4.75 × 10^-3 moles Kr B) 33.4 moles Kr C) 2.11 × 10^-4 moles Kr D) 2.99 × 10^-3 moles Kr E) 1.19 × 10^-4 moles Kr

A) 4.75 × 10^-3 moles Kr

43) Calculate the atomic mass of element "X", if it has 2 naturally occurring isotopes with the following masses and natural abundances: X-45 44.8776 amu 32.88% X-47 46.9443 amu 67.12% A) 46.26 amu B) 45.91 amu C) 46.34 amu D) 46.84 amu E) 44.99 amu

A) 46.26 amu

82) How many moles of potassium are contained in 200 g of potassium? A) 5.11 moles B) 0.956 moles C) 13.3 moles D) 10.53 moles E) 6.46 moles

A) 5.11 moles

50) Calculate the mass (in kg) of 4.87 × 10^25 atoms of Zn. A) 5.29 kg B) 1.89 kg C) 8.09 kg D) 1.24 kg E) 1.09 kg

A) 5.29 kg

14) An ion has 26 protons, 29 neutrons, and 23 electrons. The symbol for the ion is ________. A) 55Fe3+ B) 55Fe3- C) 52Cu3+ D) 52Cu3- E) 55V3-

A) 55Fe3+

51) Calculate the mass (in ng) of 2.33 × 10^20 atoms of oxygen. A) 6.19 × 10^6 ng B) 1.62 × 10^7 ng C) 2.25 × 10^3 ng D) 3.73 × 10^6 ng E) 4.69 × 10^7 ng

A) 6.19 × 10^6 ng

40) Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the following masses and natural abundances: Ga-69 68.9256 amu 60.11% Ga-71 70.9247 amu 39.89% A) 69.72 amu B) 69.93 amu C) 70.00 amu D) 69.80 amu E) 70.68 amu

A) 69.72 amu

42) Gallium has an atomic mass of 69.723 amu. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the other isotope? A) 70.924 amu B) 70.928 amu C) 70.932 amu D) 70.920 amu

A) 70.924 amu

81) What mass (in g) does 0.990 moles of Kr have? A) 83.5 g B) 119 g C) 52.8 g D) 60.0 g E) 35.6 g

A) 83.5 g

28) How many protons (p) and neutrons (n) are in an atom of 227 Ac ? 89 A) 89 p, 138 n B) 89 p, 227 n C) 138 p, 89 n D) 227 p, 89 n

A) 89 p, 138 n

21) Which of the following statements about subatomic particles is TRUE? A) A neutral atom contains the same number of protons and electrons. B) Protons have about the same mass as electrons. C) Electrons make up most of the mass of an atom. D) Protons and neutrons have opposite, but equal in magnitude, charges. E) Neutrons and electrons are found in the nucleus of an atom.

A) A neutral atom contains the same number of protons and electrons.

26) What species is represented by the following information? p+ = 47 n° = 62 e- = 46 A) Ag+ B) Nd C) Pd D) Ag E) Pd+

A) Ag+

48) Which of the following elements is a metalloid? A) As B) O C) I D) Co E) Xe

A) As

41) In which of the following sets do all species have the same number of electrons? A) Cl-, Ar, Ca2+ B) C, N3-, O2- C) K+, Rb+, Cs+ D) Br, Br-, Br+

A) Cl-, Ar, Ca2+

30) What is the element symbol for an atom that has 29 protons and 36 neutrons? A) Cu B) Kr C) N D) Tb

A) Cu

71) Which of the following elements is in Group 4? A) Hf B) Ca C) Bi D) Ne E) Cd

A) Hf

7) Give the symbol for potassium. A) K B) P C) Po D) Ka E) Pt

A) K

2) All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. Which law does this refer to? A) Law of Definite Proportions B) Law of the Conservation of Mass C) Law of Modern Atomic Theory D) Law of Multiple Proportions E) First Law of Thermodynamics

A) Law of Definite Proportions

54) Which of the following elements is a transition metal? A) Tc B) P C) F D) Cs E) Ca

A) Tc

69) Identify the anion. A) Te2- B) Ba2+ C) I D) Ne E) F2

A) Te2-

3) Identify the radioactive particle. A) a beta particle B) an anion C) a molecule D) an electron E) a mole

A) a beta particle

9) Identify the largest subatomic particle. A) a neutron B) an electron C) a proton D) an orbital E) a nucleus

A) a neutron

55) Sodium belongs to the ________ group of the periodic table. A) alkali metal B) transition element C) noble gas D) nonmetal

A) alkali metal

16) Identify a cation. A) an atom that has lost an electron B) an atom that has gained an electron C) an atom that has lost a proton D) an atom that has gained a neutron

A) an atom that has lost an electron

67) All of the following elements are nonmetals EXCEPT A) barium. B) nitrogen. C) oxygen.. D) argon. E) flourine.

A) barium.

6) Identify the equipment that Thomson utilized to do his research. A) cathode ray tube B) light bulb C) oscilloscope D) oil atomizer, light source, microscope E) electromagnetic field generator

A) cathode ray tube

36) Identify the green-yellowish gas that is used as a disinfecting agent. A) chlorine B) bromine C) iodine D) fluorine

A) chlorine

24) Ions differ in the number of A) electrons. B) neutrons. C) protons. D) neutrons and protons. E) electrons and protons.

A) electrons.

37) Identify the instrument that is used to determine the mass of a molecule. A) mass spectrometer B) nuclear magnetic resonance spectrometer C) infrared spectrometer D) gas chromatograph E) ultraviolet spectrophotometer

A) mass spectrometer

60) Which of the following elements is a gas at room temperature? A) oxygen B) boron C) bromine D) sodium E) barium

A) oxygen

5) Identify the charges of the protons, neutrons, and electrons. A) protons +1, neutrons 0, electrons -1 B) protons 0, neutrons -1, electrons 0 C) protons -1, neutrons -1, electrons 0 D) protons 0, neutrons 0, electrons 0 E) protons +1, neutrons +1, electrons +1

A) protons +1, neutrons 0, electrons -1

14) What does "X" represent in the following symbol? 28 X 14 A) silicon B) sulfur C) zinc D) ruthenium E) nickel

A) silicon

18) What element is defined by the following information? p+ = 11 n° = 12 e- = 11 A) sodium B) vanadium C) magnesium D) titanium E) selenium

A) sodium

12) The atomic number is equal to A) the number of the protons. B) the sum of the number of the neutrons and electrons. C) the sum of the number of protons, neutrons, and electrons. D) the sum of the number of protons and neutrons.

A) the number of the protons.

Describe an atom and what it is made up of according to modern atomic theory.

An atom is made up of a nucleus surrounded by electrons. The nucleus contains protons (positively charged particles) and neutrons (neutral particles) and is where most of the mass of an atom comes from, but is a tiny fraction of an atom's volume. The nucleus is surrounded by negatively charged electrons, the same number as there are protons in the nucleus. An atom is therefore neutral overall.

Are anions typically larger or smaller than their corresponding atom? Why?

Anions are larger than their corresponding atom because the anion contains more electrons than the atom. Since electrons repel one another AND determine the size of the atom or ion, adding electrons to the atom to form an anion makes it larger.

89) Which of the following does NOT contain the same number of atoms as 3.30 moles of K? A) 3.30 moles of K B) 1.50 moles of Hf C) 3.30 moles of Os D) 3.30 moles of Co E) 3.30 moles of Au

B) 1.50 moles of Hf

85) How many atoms are in 2.50 moles of N? A) 4.52 × 10^24 atoms B) 1.51 × 10^24 atoms C) 5.02 × 10^23 atoms D) 3.01 × 10^24 atoms E) 7.53 × 10^23 atoms

B) 1.51 × 10^24 atoms

76) Which of the following contains the most atoms? You shouldn't need to do a calculation here. A) 10.0 g Mg B) 10.0 g Li C) 10.0 g Ca D) 10.0 g Kr E) 10.0 g Ba

B) 10.0 g Li

38) The atomic mass for cadmium is A) 48 B) 112.41 C) 40.08 D) 20 E) 64.411

B) 112.41

31) How many electrons are in a neutral atom of chlorine-37? A) 1 B) 17 C) 18 D) 37

B) 17

80) How many gold atoms are contained in 3.75 moles of gold? A) 1.23 × 10^24 gold atoms B) 2.26 × 10^24 gold atoms C) 2.26 × 10^23 gold atoms D) 9.03 × 10^25 gold atoms E) 6.50 × 10^25 gold atoms

B) 2.26 × 10^24 gold atoms

86) How many atoms of carbon are in 4.00 moles of C? A) 7.22 × 10^24 atoms B) 2.41 × 10^24 atoms C) 8.00 × 10^23 atoms D) 3.01 × 10^24 atoms E) 6.50 × 10^23 atoms

B) 2.41 × 10^24 atoms

83) How many moles are in 2.16 × 10^24 atoms of magnesium? A) 35.9 moles B) 3.59 moles C) 0.359 moles D) 7.18 moles E) 0.90 moles

B) 3.59 moles

47) How many moles of Cs are contained in 595 kg of Cs? A) 2.23 × 10^2 moles Cs B) 4.48 × 10^3 moles Cs C) 7.91 × 10^4 moles Cs D) 1.26 × 10^3 moles Cs E) 5.39 × 10^2 moles Cs

B) 4.48 × 10^3 moles Cs

10) The atomic number of an atom of 130Xe is A) 184. B) 54. C) 76. D) 122. E) 130.

B) 54.

26) Which of the following represent isotopes? A: 79 X B: 79 X C: 78 X D: 81 X 34 35 34 36 A) A and D B) A and C C) B and D D) C and D E) all of the above

B) A and C

51) Which of the following elements is a nonmetal? A) Pu B) C C) Br D) K E) Be

B) C

72) Which of the following elements is in Period 4? A) Zr B) Ca C) Bi D) He E) Ag

B) Ca

27) What species is represented by the following information? p+ = 17 n° = 18 e- = 18 A) Cl B) Cl- C) Ar D) Ar+ E) Kr

B) Cl-

1) In a chemical reaction, matter is neither created nor destroyed. Which law does this refer to? A) Law of Definite Proportions B) Law of the Conservation of Mass C) Law of Modern Atomic Theory D) Law of Multiple Proportions E) First Law of Thermodynamics

B) Law of the Conservation of Mass

68) Identify the cation. A) O2- B) Sr2+ C) Br D) Kr E) I2

B) Sr2+

31) Which of the following statements is FALSE? A) Halogens are very reactive elements. B) The alkali metals are fairly unreactive. C) Sulfur is a main group element. D) Noble gases do not usually form ions. E) Zn is a transition metal.

B) The alkali metals are fairly unreactive.

20) What is the chemical symbol for thallium? A) Ti B) Tl C) Tm D) Th E) Tr

B) Tl

4) Which of the following is an example of the law of multiple proportions? A) A sample of chlorine is found to contain three times as much Cl-35 as Cl-37. B) Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C. C) Two different samples of table salt are found to have the same ratio of sodium to chlorine. D) The atomic mass of bromine is found to be 79.90 amu. E) Nitrogen dioxide always has a mass ratio of 2.28 g O: 1 g N.

B) Two different compounds formed from carbon and oxygen have the following mass ratios: 1.33 g O: 1 g C and 2.66 g O: 1 g C.

58) Beryllium belongs to the ________ group of the periodic table. A) alkali metal B) alkaline earth metal C) transition element D) nonmetal

B) alkaline earth metal

17) Identify an anion. A) an atom that has lost an electron B) an atom that has gained an electron C) an atom that has lost a proton D) an atom that has gained a neutron and a proton

B) an atom that has gained an electron

25) An atom that has an atomic number of 38 and a mass number of 88 is an isotope of an atom that has A) an atomic number of 39 and a mass number of 88. B) an atomic number of 38 and a mass number of 86. C) 50 neutrons and 38 protons. D) 50 protons and 38 neutrons.

B) an atomic number of 38 and a mass number of 86.

10) Identify the smallest subatomic particle. A) a neutron B) an electron C) a proton D) an alpha particle E) a nucleus

B) an electron

2) Identify the discovery that Thomson made. A) a neutron B) an electron C) the charge of a single electron D) an alpha particle E) anions

B) an electron

44) Identify how the atomic mass of an element is determined. A) average of ions B) average of isotopic masses C) average of radioactive particles D) average of crude weights E) average of protons

B) average of isotopic masses

19) What element is defined by the following information? p+ = 20 n° = 20 e- = 20 A) zirconium B) calcium C) potassium D) neon E) argon

B) calcium

64) Which of the following elements is classified as a metalloid? A) sodium B) germanium C) iodine D) gold E) calcium

B) germanium

66) Which one of the following elements is a poor conductor of heat and electricity? A) chromium B) iodine C) copper D) aluminum E) nickel

B) iodine

15) Determine the number of protons, neutrons, and electrons in the following: 40 X 18 A) p+ = 18 n° = 18 e- = 22 B) p+ = 18 n° = 22 e- = 18 C) p+ = 22 n° = 18 e- = 18 D) p+ = 18 n° = 22 e- = 40 E) p+ = 40 n = 22 e- = 18

B) p+ = 18 n° = 22 e- = 18

52) How many xenon atoms are contained in 2.36 moles of xenon? A) 3.92 × 10^24 xenon atoms B) 2.55 × 10^23 xenon atoms C) 1.42 × 10^24 xenon atoms D) 7.91 × 10^25 xenon atoms E) 1.87 × 10^26 xenon atoms

C) 1.42 × 10^24 xenon atoms

74) The average atomic mass for silver is ________. A) 28.09 B) 14 C) 107.87 D) 47

C) 107.87

90) Which of the following is equal to exactly 1 mole of atoms? A) 6.00 grams of carbon B) 30.69 grams of nickel C) 12.01 grams of carbon D) 12.31 grams of magnesium E) 34.00 grams of selenium

C) 12.01 grams of carbon

91) Which of the following is equal to exactly Avogadro's number of atoms? A) 8.00 grams of oxygen B) 35.38 grams of zinc C) 12.01 grams of carbon D) 11.99 grams of sodium E) 34.00 grams of selenium

C) 12.01 grams of carbon

12) How many neutrons are in manganese-54? A) 25 B) 30 C) 29 D) 29.4 E) 54.9

C) 29

30) Predict the charge that an ion formed from nitrogen would have. A) 1- B) 6+ C) 3- D) 3+ E) 2-

C) 3-

33) An atom of 131 I contains ________ neutrons. A) 53 B) 184 C) 78 D) 124 E) 131

C) 78

78) How many Li atoms are contained in 97.9 g of Li? A) 5.90 × 1025 Li atoms B) 7.09 × 1021 Li atoms C) 8.49 × 1024 Li atoms D) 4.27 × 1022 Li atoms E) 4.18 × 1024 Li atoms

C) 8.49 × 1024 Li atoms

21) What is the chemical symbol for molybdenum? A) Ma B) Au C) Mo D) K E) Mb

C) Mo

20) What element is defined by the following information? p+ = 17 n° = 20 e- = 17 A) calcium B) rubidium C) chlorine D) neon E) oxygen

C) chlorine

56) Iodine belongs to the ________ group of the periodic table. A) alkali metal B) metal C) halogen D) noble gas

C) halogen

61) Which of the following elements is a liquid at room temperature? A) radon B) boron C) mercury D) lithium E) calcium

C) mercury

73) List the element that is in the highest percentage by mass in our bodies. A) nitrogen B) phosphorus C) oxygen D) silicon E) sodium

C) oxygen

16) Determine the number of protons, neutrons, and electrons in the following: 25 X 12 A) p+ = 12 n° = 25 e- = 12 B) p+ = 12 n° = 12 e- = 13 C) p+ = 12 n° = 13 e- = 12 D) p+ = 25 n° = 12 e- = 13 E) p+ = 12 n° = 13 e- = 25

C) p+ = 12 n° = 13 e- = 12

28) Identify the largest atom or ion of carbon. A) p+ = 6 n° = 6 e- = 6 B) p+ = 6 n° = 7 e- = 6 C) p+ = 6 n° = 6 e- = 7 D) p+ = 6 n° = 6 e- = 5

C) p+ = 6 n° = 6 e- = 7

8) Identify the description of an atom. A) neutrons and electrons in nucleus; protons in orbitals B) neutrons in nucleus; protons and electrons in orbitals C) protons and neutrons in nucleus; electrons in orbitals D) protons and electrons in nucleus; neutrons in orbitals E) electrons in nucleus; protons and neutrons in orbitals

C) protons and neutrons in nucleus; electrons in orbitals

32) Which of the following does NOT describe a metal? A) good conductor of heat B) good conductor of electricity C) tends to gain electrons D) forms ionic compounds with nonmetals E) found on the left side of the periodic table

C) tends to gain electrons

1) Identify the discovery that Millikan made. A) the mass of a proton B) the charge of a proton C) the charge of a single electron D) the mass of a beta particle E) molecules

C) the charge of a single electron

24) Which element has the chemical symbol, Sn? A) samarium B) lead C) tin D) tungsten E) selenium

C) tin

6) Identify the element that has an atomic number of 40. A) neon B) calcium C) zirconium D) bromine E) gold

C) zirconium

88) What mass (in kg) does 4.41 moles of copper have? A) 0.352 kg B) 0.122 kg C) 0.820 kg D) 0.280 kg E) 0.632 kg

D) 0.280 kg

38) Give the number of protons in P3-. A) 18 B) 12 C) 19 D) 15 E) 16

D) 15

43) Predict the charge that a strontium ion would have. A) 6- B) 2- C) 4- D) 2+ E) 1+

D) 2+

75) The atomic number for iron is ________. A) 192.22 B) 77 C) 55.85 D) 26

D) 26

87) How many atoms are in 5.00 moles of O? A) 4.52 × 10^23 atoms B) 1.51 × 10^24atoms C) 5.02 × 10^23atoms D) 3.01 × 10^24 atoms E) 3.01 × 10^23 atoms

D) 3.01 × 10^24 atoms

48) How many iron atoms are contained in 354 g of iron? A) 2.62 × 10^25 Fe atoms B) 2.13 × 10^26 Fe atoms C) 4.69 × 10^24 Fe atoms D) 3.82 × 10^24 Fe atoms E) 9.50 × 10^22 Fe atoms

D) 3.82 × 10^24 Fe atoms

34) The mass number of an atom of 79Br is ________. A) 35 B) 114 C) 44 D) 79 E) 72

D) 79

23) Give the symbol for silver. A) S B) Si C) Ar D) Ag E) Sl

D) Ag

47) Which of the following elements is a metal? A) Sb B) O C) Br D) Ag E) He

D) Ag

52) Which of the following elements is a alkali metal? A) U B) C C) F D) K E) Ca

D) K

3) When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers. Which law does this refer to? A) Law of Definite Proportions B) Law of the Conservation of Mass C) Law of Modern Atomic Theory D) Law of Multiple Proportions E) First Law of Thermodynamics

D) Law of Multiple Proportions

32) Identify the chemical symbol of element Q in 18 Q. 8 A) Ar B) F C) Ne D) O

D) O

42) In which of the following sets do all species have the same number of protons? A) F-, Ne, Mg2+ B) C, N3-, O2- C) Sr2+, Ba2+, Ra2+ D) S, S2-, S2+

D) S, S2-, S2+

35) What is the identity of element Q if the ion Q2+ contains 36 electrons? A) Ge B) Se C) Kr D) Sr

D) Sr

35) Which of the following statements is FALSE? A) Anions are usually larger than their corresponding atom. B) Metals tend to form cations. C) Atoms are usually larger than their corresponding cation. D) The halogens tend to form 1+ ions. E) Nonmetals tend to gain electrons.

D) The halogens tend to form 1+ ions.

65) Which of the following elements is a good conductor of heat and electricity? A) carbon B) chlorine C) xenon D) aluminum

D) aluminum

13) What does "X" represent in the following symbol? 80 X 35 A) mercury B) chlorine C) scandium D) bromine E) selenium

D) bromine

57) Helium belongs to the ________ group of the periodic table. A) alkali metal B) metal C) transition metal D) noble gas

D) noble gas

33) Which of the following does NOT describe a nonmetal? A) tends to gain electrons B) found in the upper right hand corner of the periodic table C) poor conductor of electricity D) nonmetals are generally unreactive E) poor conductor of heat

D) nonmetals are generally unreactive

7) Identify the equipment that Millikan utilized to do his research. A) cathode ray tube B) light bulb C) oscilloscope D) oil atomizer, light source, microscope E) electromagnetic field generator

D) oil atomizer, light source, microscope

17) Determine the number of protons, neutrons, and electrons in the following: 65 X 29 A) p+ = 36 n° = 29 e- = 36 B) p+ = 29 n° = 29 e- = 36 C) p+ = 36 n° = 36 e- = 29 D) p+ = 29 n° = 36 e- = 29 E) p+ = 29 n° = 36 e- = 36

D) p+ = 29 n° = 36 e- = 29

59) Which of the following elements has chemical properties similar to tellurium? A) bromine B) lithium C) nitrogen D) sulfur E) helium

D) sulfur

11) The mass number is equal to A) the sum of the number of the electrons and protons. B) the sum of the number of the neutrons and electrons. C) the sum of the number of protons, neutrons, and electrons. D) the sum of the number of protons and neutrons.

D) the sum of the number of protons and neutrons.

77) Which of the following contains the fewest atoms? You shouldn't need to do a calculation here. A) 10.0 g Mg B) 10.0 g Li C) 10.0 g Ar D) 10.0 g Rb E) 10.0 g Cs

E) 10.0 g Cs

39) Calculate the atomic mass of silver if silver has 2 naturally occurring isotopes with the following masses and natural abundances: Ag-107 106.90509 amu 51.84% Ag-109 108.90476 amu 48.46% A) 107.90 amu B) 108.00 amu C) 107.79 amu D) 108.32 amu E) 108.19 amu

E) 108.19 amu

36) Give the number of neutrons in 31P3-. A) 18 B) 12 C) 19 D) 15 E) 16

E) 16

44) Predict the charge that an ion formed from tellerium would have. A) 1- B) 6- C) 3- D) 4- E) 2-

E) 2-

29) Predict the charge that an aluminum ion would have. A) 5- B) 1+ C) 1- D) 2+ E) 3+

E) 3+

19) How many protons does the As3- ion possess? A) 30 B) 36 C) 4 D) 8 E) 33

E) 33

79) Calculate the mass (in g) of 2.1 × 1024 atoms of W. A) 3.9 × 102 g B) 2.4 × 102 g C) 3.2 × 102 g D) 1.5 × 102 g E) 6.4 × 102 g

E) 6.4 × 102 g

5) Which of the following statements is FALSE according to Dalton's Atomic Theory? A) Atoms combine in simple whole number ratios to form compounds. B) All atoms of chlorine have identical properties that distinguish them from other elements. C) One carbon atom will combine with one oxygen atom to form a molecule of carbon monoxide. D) Atoms of sodium do not change into another element during chemical reaction with chlorine. E) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen.

E) An atom of nitrogen can be broken down into smaller particles that will still have the unique properties of nitrogen.

53) Which of the following elements is an alkaline earth metal? A) La B) P C) I D) Rb E) Ba

E) Ba

49) Which of the following elements is a noble gas? A) As B) C C) F D) Co E) He

E) He

25) What species is represented by the following information? p+ = 12 n° = 14 e- = 10 A) Si4+ B) Mg C) Ne D) Si E) Mg2+

E) Mg2+

22) Which of the following statements about isotopes is TRUE? A) Isotopes of the same element differ only in the number of electrons they contain. B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. C) Isotopes of the same element have the same mass. D) Isotopes of the same element don't usually have the same properties. E) Some elements have 3 or more naturally occurring isotopes.

E) Some elements have 3 or more naturally occurring isotopes.

62) Which of the following elements is a solid at room temperature? A) chlorine B) helium C) mercury D) oxygen E) barium

E) barium

27) What does "X" represent in the following symbol? 65 X 29 A) dysprosium B) nickel C) terbium D) silicon E) copper

E) copper

Describe the difference between ions and isotopes.

Ions have the loss or gain of electrons; isotopes differ in the number of neutrons

Why do the isotopes of the same element have the same atomic size?

Isotopes only differ in the number of neutrons contained within the nucleus. Since the size of an atom is determined by the electrons, isotopes of the same element should be the same size.

Why do elements in the same group tend to have similar chemical properties?

Since elements in the same group tend to react similarly, they form the ions with the same charge.

What group of elements in the periodic table are the most unreactive and why?

The noble gases are the most unreactive since they do not combine with other elements to form compounds.

The atomic number is equal to the number of ________.

protons

Give the name of the element whose symbol is Na.

sodium