chem 101 chapter 2

what ion has the same electronic configuration as the noble gas Ne? Choose all that apply? A. O^2- B. Cl^- C. I^- D. Li^+ E. Sr^2+ F. S^2- G. Be^2+ H. Cs^+ I. As^3- J. Ca^2+ K. Mg^2+ L. Al^3+ M.H^- N. Fe^2+

A. O^2- K. Mg^2+ L. Al^3+

which of the following is a representative nonmetal? A. P B. K C. Si D. Ni E. Al

A. P

which of the following accounts foe the fact that chlorine has an atomic mass of 35.45 amu rather than a whole number? A. isotopes B. electrons C. protons D. radioactivity E. isomers

A. isotopes

what ion has the same electronic configuration as the noble gas Ar? Choose all that apply? A. O^2- B. Cl^- C. I^- D. Li^+ E. Sr^2+ F. S^2- G. Be^2+ H. Cs^+ I. As^3- J. Ca^2+ K. Mg^2+ L. Al^3+ M.H^- N. Fe^2+

B. Cl^- F. S^2- J. Ca^2+

which of the following elements is a metalloid? A. C B. Ge C. Pb D. N E. P

B. Ge

how may neutrons are in the nucleus of the isotope Po-210?

210-84 = 126 neutrons

determine the isotope symbol that fits each description: atomic number = 86, 136 neutrons

222 Rn 86

in the calcium atom represented by the symbol 40 Ca 20 there are 20 protons, 20 neutrons, and 20 electrons. True or False

true

calculate the number of protons, neutrons, and electrons in the following element 31 P 15

15 protons 16 neutrons 15 electrons

provide the name of the element represented by each of the following symbols 1. Na 2. K 3. Mg 4. B

1. sodium 2. potassium 3. magnesium 4. boron

determine the isotope symbol that fits each description: 68 neutrons, 47 electrons

115 Ag 47

calculate the number of protons, neutrons, and electrons in an atom of magnesium. the atomic symbol for magnesium atoms is 25 Mg 12

12 protons 13 neutrons 12 electrons

calculate the number of protons, neutrons, and electrons in an atom of sulfur. the atomic symbol for the sulfur atom is 32 S 16

16 protons 16 neutrons 16 electrons

determine the isotope symbol that fits each description: atomic number = 76, mass number = 192

192 Os 76

determine the isotope symbol that fits each description: mass number = 197, 79 electrons

197 Au 79

electrons surround the _1__ and have a _2__ charge 1A. protons 1B. neutrons 1C. atom 1D. nucleus 2A. neutral 2B. positive 2C. negative

1D. nucleus 2C. negative

how many protons, neutrons, and electrons are present in a single atom of arsenic-75?

33 protons 42 neutrons 33 electrons

calculate the number of protons, neutrons, and electrons in the following element 16 O 8

8 protons 8 neutrons 8 electrons

which one of the following electron configurations is appropriate for a ground state atom? A. 1s^1 2s^1 B. 1s^2 2s^1 C. 1s^2 2s^2 2p^8 D. 1s^2 2s^2 2p^4 3s^1 E. 1s^2 2s^2 2p^6 3d^1

B. 1s^2 2s^1

how many neutrons are present in an atom of the isotope 7 Li 3 A. 3 B. 4 C. 7 D. 10 E. none of the choices are correct

B. 4

which of the following correctly matches the ion with the total number of electrons in the ion? A. Br^- with 34 electrons B. Mg^2+ with 14 electrons C. Zn^2+ with 28 electrons D. P^3- with 15 electrons E. H^+ with 2 electrons

B. Mg^2+ with 14 electrons

refer to the periodic table to find the element whose atoms contain 28 protons A. Bh B. Ni C. Hg D. V

B. Ni

which of the following are metals? Select all that apply. A. S B. Zn C. K D. Cu E. Kr F. Br G. C H. Ca

B. Zn C. K D. Cu H. Ca

isotopes of an element differ in mass because the atoms have a different number of A. protons B. neutrons C. electrons

B. neutrons

the mass number of an atom is due to the number of ___ in the nucleus A. electrons and neutrons B. neutrons and protons C. protons and electrons

B. neutrons and protons

what group 1A (1) ion has the electronic arrangement shown 1s^2 2s^2 2p^6 A. lithium ion B. sodium ion C. potassium ion D. magnesium ion E. calcium ion

B. sodium ion

the ground state electron configuration of chlorine is shown. which statement concerning an atom of chlorine is false? Cl= 1s^2 2s^2 2p^6 3s^2 3p^5 A. a chlorine atom has 17 total electrons B. the outermost energy level in a chlorine atom is n=3 C. a chlorine atom has 5 valence electrons D. a chlorine atom needs one electron to obtain an octet in its outermost energy level E. a chlorine atom has 17 protons

C. a chlorine atom has 5 valence electrons

which isotope of hydrogen has two neutrons A. hydrogen-1 B. hydrogen-2 C. hydrogen-3 D. deuterium E. H-2

C. hydrogen-3

what does the mass number minus the atomic number represent? A. number of protons B. number of electrons C. number of neutrons D. number of protons -number of neutrons E. number of neutrons - number of protons

C. number of neutrons

the atomic number gives the number of ___ in the nucleus A. neutrons B. electrons C. protons

C. protons

what ion has the same electronic configuration as the noble gas He? Choose all that apply? A. O^2- B. Cl^- C. I^- D. Li^+ E. Sr^2+ F. S^2- G. Be^2+ H. Cs^+ I. As^3- J. Ca^2+ K. Mg^2+ L. Al^3+ M.H^- N. Fe^2+

D. Li^+ G. Be^2+ M. H^-

which of the following is a metal in the third period? A. Ge B. Cl C. Ca D. Mg E. Cu

D. Mg

which of the following elements is most likely to form a 2+ ion? A. Li B. K C. Al D. N E. Ca

E. Ca

what ion has the same electronic configuration as the noble gas Kr? Choose all that apply? A. O^2- B. Cl^- C. I^- D. Li^+ E. Sr^2+ F. S^2- G. Be^2+ H. Cs^+ I. As^3- J. Ca^2+ K. Mg^2+ L. Al^3+ M.H^- N. Fe^2+

E. Sr^2+ I. As^3-

what is the ground state (shorthand) electron configuration of Se? A. [Kr] B. [Ar] 4s^2 4p^4 C. [Kr] 4s^2 4p^4 D. [Ar] 4s^2 4d^10 4p^6 E. [Ar] 4s^2 3d^10 4p^4

E. [Ar] 4s^2 3d^10 4p^4

for the following element symbol, give the name of the element, its atomic number, and its atomic mass. Ar

name: argon atomic number: 18 atomic mass: 39.948 amu

for the following element symbol, give the name of the element, its atomic number, and its atomic mass. Br

name: bromine atomic number: 35 atomic mass: 79.904 amu