Chemistry The Central Science 10th Edition By brown - Test Bank

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) Vanadium has two naturally occurring isotopes, 50V with an atomic mass of 49.9472 amu and 51V

with an atomic mass of 50.9440. The atomic weight of vanadium is 50.9415. The percent

abundances of the vanadium isotopes are __________% 50V and __________% 51V.

A) 1.000, 99.000

B) 49.00, 51.00

C) 0.2500, 99.750

D) 99.000, 1.000

E) 99.750, 0.2500

Answer: C Explanation: A) B) C) D) E)

2) Which species has 16 protons? A) 31P B) 80Br- C) 34S2- D) 16O E) 36Cl

Answer: C Explanation: A) B) C) D) E)

3) The suffix -ide is used __________. A) for monatomic anion names

B) for monoatomic cations

C) for polyatomic cation names

D) for the name of the first element in a molecular compound

E) to indicate binary acids

Answer: A Explanation: A) B) C) D) E)

4) The atomic number of an atom of 80Br is __________. A) 35 B) 73 C) 115 D) 80 E) 45

Answer: A Explanation: A) B) C) D) E)

1)

2)

3)

4)

15) Which species has 54 electrons? A) 132 54 Xe2+ B) 132 54 Xe+ C) 112 48 Cd Answer: E Explanation: A) B) C) D) E)

D) 118 50 Sn2+ E) 128 52 Te2-

6) Of the choices below, which one is not an ionic compound? A) PbCl2 B) PCl5 C) MoCl6 D) NaCl E) RbCl

Answer: B Explanation: A) B) C) D) E)

7) Isotopes are atoms that have the same number of __________ but differing number of __________. A) protons, electrons

B) neutrons, electrons

C) protons, neutrons

D) electrons, protons

E) neutrons, protons

Answer: C Explanation: A) B) C) D) E)

8) __________-rays consist of fast-moving electrons. A) gamma

B) beta

C) X

D) alpha

E) none of the above

Answer: B Explanation: A) B) C) D) E)

2

5)

6)

7)

8)9) Of the three types of radioactivity characterized by Rutherford, which is/are not particles? A) -rays

B) -rays, -rays, and -rays

C) -rays

D) -rays

E) -rays and -rays

Answer: A Explanation: A) B) C) D) E)

10) Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties? A) C, N B) K, Ca C) H, He D) Si, P E) O, S

Answer: E Explanation: A) B) C) D) E)

11) The elements in groups 1A, 6A, and 7A are called