Chapter 3

An atom that contains 47 protons, 47 electrons, and 60 neutrons is an isotope of A) Ag B) Bh C) Al D) Nd E) cannot be determined from the information given

A

An imaginary element Xz consists of two isotopes having masses of 100.0 amu and 102.0 amu. A sample of Xz was found to contain 75.0% of the ^100Xz isotope and 25.0% of the ^102Xz. Calculate the atomic weight of Xz. A) 100.5 amu B) 101.5 amu C) 101.0 amu D) 100.3 amu E) 101.8 amu

A

Atoms of (35/17) Cl contain ________ protons and ________ electrons. A) 17, 17 B) 18, 17 C) 35, 18 D) 35, 17 E) 17, 18

A

Elements in the Periodic Table are arranged according to A) atomic number B) atomic weight C) number of neutrons D) date of discovery E) alphabetical order

A

How many electrons can occupy the 4d subshell? A) 10 B) 6 C) 2 D) 1 E) 8

A

How many electrons can occupy the 4s subshell? A) 2 B) 8 C) 6 D) 10 E) 1

A

Hydrogen exists as three isotopes. These isotopes differ by the number of ________ contained in the atom. A) neutrons B) electrons C) protons D) charges

A

In a neutral atom the number of ________ is equal to the number of ________. A) protons, electrons B) protons + electrons, neutrons C) protons, neutrons D) neutrons, electrons E) none of the above

A

The element with the electron configuration 1s2 2s2 2p4 is ________. A) O B) Be C) S D) Si E) C

A

The shell having n = 2 contains ________ subshells, ________ orbitals, and up to ________ electrons. A) 2, 4, 8 B) 3, 6, 12 C) 1, 2, 4 D) 4, 8, 16 E) none of the above

A

The smallest amount of an element that retains that element's characteristics is the A) atom B) neutron C) electron D) molecule E) proton

A

The value of Z for an atom containing 29 protons, 29 electrons, and 34 neutrons, is A) 29 B) 58 C) 5 D) 34 E) 63

A

Where is most of the mass of an atom concentrated? A) nucleus B) electrons C) protons D) orbitals E) neutrons

A

Which group contains only noble gases? A) Kr, Xe, Rn B) Ce, Pr, Nd C) Po, Fr, Ac D) Si, Ge, As E) Ni, Pd, Pt

A

Which of the following subshells consists of five orbitals? A) 4d B) 4p C) 4f D) 4s E) none of the above

A

Which statement is incorrect according to modern atomic theory? A) Some sugars have the formula C3.5H7O3.5. B) An atom of 14N behaves differently in chemical reactions than an atom of 14C. C) C2H6 and C3H8 are both possible compounds of carbon and hydrogen. D) An atom of 14N has the same approximate mass as an atom of 14C. E) An example of a chemical reaction is CaCO3 → CaO + CO2.

A

An atom containing 47 protons, 47 electrons, and 60 neutrons has a mass number of A) 47 B) 107 C) 60 D) 13 E) 154

B

An atom with Z = 26 and A = 58 contains ________ protons, ________ electrons, and ________ neutrons. A) 32; 26; 32 B) 26; 26; 32 C) 26; 32; 84 D) 58; 26; 26 E) 26; 26; 58

B

An atom with Z = 31 and A = 69 contains ________ protons and ________ neutrons. A) 69; 31 B) 31; 38 C) 38; 31 D) 31; 69 E) 31; 100

B

An element with the same number of valence electrons as the element with the electron configuration 1s2 2s2 2p6 3s2 3p5 is A) argon. B) iodine. C) chlorine. D) sulfur. E) potassium.

B

An imaginary element Xq consists of two isotopes having masses of 100.0 amu and 102.0 amu. A sample of Xq was found to contain 20.0% of the ^100 Xq isotope and 80.0% of the ^102 Xq. Calculate the atomic weight of Xq. A) 100.2 amu B) 101.6 amu C) 101.0 amu D) 202.0 amu E) 100.4 amu

B

Atoms of (35/17)Cl contain ________ protons and ________ neutrons. A) 35, 17 B) 17, 18 C) 18, 17 D) 35, 18 E) 17, 17

B

How many electrons can occupy the 4p subshell? A) 1 B) 6 C) 8 D) 10 E) 2

B

The atomic number of an atom containing 47 protons, 47 electrons, and 60 neutrons is A) 13 B) 47 C) 60 D) 154 E) 107

B

The mass number of Br-81 is A) 46 B) 81 C) 79.904 D) 79 E) 35

B

The number of valence electrons in a main group element is given by ________. A) the elements atomic number B) the elements group number C) the elements atomic weight D) none of the above

B

The shell having n = 3 contains ________ subshells, ________ orbitals, and up to ________ electrons. A) 3, 6, 18 B) 3, 9, 18 C) 2, 4, 8 D) 3, 6, 12 E) 3, 12, 36

B

The value of A for an atom containing 29 protons, 29 electrons, and 34 neutrons is A) 5 B) 63 C) 58 D) 29 E) 34

B

The value of Z for the element ^37Ar is A) 37 B) 18 C) 39.945 D) 21.945 E) 19

B

What is the maximum number of electrons that can occupy the 4p orbitals? A) 8 B) 6 C) 2 D) 10 E) 14

B

Which characteristics correctly describe a proton? A) approximate mass 5 × 10-4 amu; charge -1; outside nucleus B) approximate mass 1 amu; charge +1; inside nucleus C) approximate mass 1 amu; charge +1; outside nucleus D) approximate mass 1 amu; charge 0; inside nucleusE) approximate mass 5 × 10-4 amu; charge +1; inside nucleus

B

Which characteristics correctly describe an electron? A) approximate mass 5 × 10-4 amu; charge 0; inside nucleus B) approximate mass 5 × 10-4 amu; charge -1; outside nucleus C) approximate mass 1 amu; charge 0; inside nucleus D) approximate mass 1 amu; charge -1; inside nucleus E) approximate mass 1 amu; charge +1; inside nucleus

B

Which element is most likely to have chemical properties similar to those of potassium (atomic number 19)? A) Sr (atomic number 38) B) Rb (atomic number 37) C) Ar (atomic number 18) D) Sc (atomic number 21) E) Ca (atomic number 20)

B

Which group contains only f-block elements? A) Ni, Pd, Pt B) Ce, Pr, Nd C) Si, Ge, As D) Po, Fr, Ac E) Kr, Xe, Rn

B

Which group contains only metalloids? A) Ce, Pr, Nd B) Si, Ge, As C) Kr, Xe, Rn D) Po, Fe, Ac E) Ni, Pd, Pt

B

An atom with Z = 26 and A = 58 contains ________ protons and ________ neutrons. A) 25; 58 B) 32; 26 C) 26; 32 D) 26; 84 E) 58; 26

C

An isotope with 15 protons and 17 neutrons will have which symbol? A) (32/17) Cl B) (17/15) P C) (32, 15) P D) (32/17) P E) (17/15) Cl

C

An s-block element in the 5th Period is A) As B) Ag C) Sr D) Y E) Mo

C

Another name for atomic mass unit (amu) is the A) avogadro B) kekule C) dalton D) kelvin E) mendeleev

C

Consider the isotope 79/35 Br. The atomic number is ________, and the mass number is ________. A) 79, 35 B) 35, 44 C) 35, 79 D) 44, 35 E) 35, 114

C

For the isotope ^71Ga, Z = ________ and A = ________. A) 71; 31 B) 31; 69.723 C) 31; 71 D) 31; 40 E) 71; 40

C

In terms of atomic structure, the common characteristic of elements in the same group is A) number of protons. B) number of neutrons. C) number of electrons in the outermost shell. D) number of electrons. E) none of the above

C

The symbol of the element with 23 protons is A) Mg B) B C) V D) Na E) none of the above

C

What is the electron configuration of Fe? A) 1s2 2s2 2p6 3s2 3p6 4s2 4p6 B) 1s2 2s2 2p6 3s2 3p6 3d8 C) 1s2 2s2 2p6 3s2 3p6 4s2 3d6 D) 1s2 2s2 2p6 3s2 3p6 4s2 E) 1s2 2s2 2p6 3s2 3p6 3d6

C

What is the electron configuration of Mg? A) 1s2 2s2 2p6 3s2 3p6 4s2 3d5 B) 1s2 2s2 2p6 3s1 3p3 C) 1s2 2s2 2p6 3s2 D) 1s2 2s2 2p8 E) none of the above

C

What is the electron configuration of S? A) 1s2 2s2 2p2 B) 1s2 2s2 2p6 3s2 3p6 C) 1s2 2s2 2p6 3s2 3p4 D) 1s2 2s2 2p6 3s2 3p2 E) 1s2 2s2 2p6 3s2 3p6 4s2 3d1

C

Which element is most likely to have chemical properties similar to those of bromine (atomic number 35)? A) S (atomic number 16) B) Te (atomic number 52) C) I (atomic number 53) D) Se (atomic number 34) E) Kr (atomic number 36)

C

Which of the following elements is a noble gas? A) O B) Cl C) Ne D) H E) N

C

Which of the following subshells consists of three orbitals? A) 4f B) 4d C) 4p D) 4s E) none of the above

C

An atom with a mass number of 58 and with 32 neutrons will have ________ protons. A) 32 B) 16 C) 58 D) 26 E) 90

D

How many neutrons does an atom of (46/22)Ti have? A) 68 B) 22 C) 0 D) 24 E) 46

D

Protons possess a ________ charge, and electrons possess a ________ charge. A) zero, positive B) negative, negative C) negative, positive D) positive, negative E) positive, zero

D

The correct order for filling orbitals with electrons is ________. A) 1s2s3s4s2p3p3d B) 1s2s3d2p3p3s4s C) 1s2s2p3s3d4s3p D) 1s2s2p3s3p4s3d

D

The electron configuration for phosphorus is A) 2s2 2p6 3s2 3p5. B) 1s2 1p6 2s2 2p5. C) 1s2 2s2 2p6 3p5. D) 1s2 2s2 2p6 3s2 3p3. E) 1s2 2s2 2p6 3s4 3p1.

D

The element which has four valence electrons is ________. A) Na B) S C) Mg D) Si E) H

D

The element with the electron configuration 1s2 2s2 2p6 3s2 3p5 is A) carbon. B) sulfur. C) potassium. D) chlorine. E) fluorine.

D

The maximum number of electrons in any orbital is ____. A) 3 B) 5 C) 4 D) 2 E) 1

D

The number of valence electrons in an element with electron configuration 1s2 2s2 2p6 3s2 3p4 is ________. A) 8 B) 4 C) 2 D) 6 E) 16

D

The value for Z for an atom containing 47 protons, 47 electrons, and 60 neutrons is A) 13 B) 60 C) 154 D) 47 E) 107

D

Valence electrons in the main group elements are contained in which type(s) of orbitals? A) s B) d C) p D) s and p

D

Which characteristics correctly describe a neutron? A) approximate mass 5 × 10-4 amu; charge 0; inside nucleus B) approximate mass 5 × 10-4 amu; charge -1; outside nucleus C) approximate mass 1 amu; charge -1; inside nucleus D) approximate mass 1 amu; charge 0; inside nucleus E) approximate mass 1 amu; charge +1; inside nucleus

D

Which column of the periodic table contains only nonmetals? A) 5A B) 4A C) 6A D) 7A

D

Which element is not a semimetal? A) As B) Ge C) Si D) Al E) none of the above

D

Which elements all belong in the same group? A) C, N, O B) B, Si, As C) Fe, Cu, Ni D) F, Cl, Br E) Al, Ge, Sb

D

Which group contains only d-block elements? A) Kr, Xe, Rn B) Po, Fr, Ac C) Si, Ge, As D) Ni, Pd, Pt E) Ce, Pr, Nd

D

Which group of elements contains only non-metals? A) Cl, Ar, K B) V, Cr, Mn C) P, As, Se D) C, S, I E) Mg, Ca, Sr

D

Which of the following is an alkali metal? A) He B) Cl C) Al D) Na E) O

D

An atom containing 29 protons, 29 electrons, and 34 neutrons has a mass number of A) 29 B) 58 C) 34 D) 5 E) 63

E

How many electrons can occupy the shell having n=2? A) 2 B) 6 C) 32 D) 18 E) 8

E

How many electrons can occupy the shell having n=4? A) 10 B) 2 C) 18 D) 8 E) 32

E

Magnesium is an example of a(an) A) halogen B) noble gas C) transition metal D) alkali metal E) alkaline earth

E

Protons possess a ________ charge, and neutrons possess a ________ charge. A) negative, positive B) negative, negative C) zero, positive D) positive, negative E) positive, zero

E

The atomic number of an atom containing 29 protons, 29 electrons, and 34 neutrons is A) 58. B) 34. C) 63. D) 5. E) 29

E

The electron capacity of the third shell is ________. A) 8 B) 10 C) 32 D) 24 E) 18

E

The element with the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 is A) Ca B) Rb C) Mg D) Ar E) K

E

The value for A for an atom containing 47 protons, 47 electrons, and 60 neutrons is A) 60 B) 47 C) 154 D) 13 E) 107

E

Transition metals can also be called A) f-block elements. B) precious metals. C) p-block elements. D) s-block elements. E) d-block elements.

E

What is the maximum number of electrons that can occupy the 4d orbitals? A) 14 B) 2 C) 8 D) 6 E) 10

E

Which particle has a mass approximately equal to the mass of a proton? A) nucleus B) electron C) quark D) atom E) neutron

E