Homework Chapter 03 Chemistry 51 Los Angeles Mission College
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1 3.93 Give the period and group number for each of the following elements: a. bromine b. argon c. potassium d. radium 3.94 Give the period and group number for each of the following elements: a. radon b. lead c. carbon d. neon 3.95 The following trace elements have been found to be crucial to the functions of the body. Indicate each as a metal, nonmetal, or a. zinc b. cobalt c. manganese d. iodine 3.96 The following trace elements have been found to be crucial to the functions of the body. Indicate each as a metal, nonmetal, or a. copper b. selenium c. arsenic d. chromium 3.97 Indicate if each of the following statements is true or false: a. The proton is a negatively charged particle. b. The neutron is 2000 times as heavy as a proton. c. The atomic mass unit is based on a carbon atom with 6 protons and 6 neutrons. d. The nucleus is the largest part of the atom. e. The electrons are located outside the nucleus Indicate if each of the following statements is true or false: a. The neutron is electrically neutral. b. Most of the mass of an atom is due to the protons and neutrons. c. The charge of an electron is equal, but opposite, to the charge of a neutron. d. The proton and the electron have about the same mass. e. The mass number is the number of protons For the following atoms, give the number of protons, neutrons, and electrons: a. Cd b. Tc c. Au d. Rn e. Xe For the following atoms, give the number of protons, neutrons, and electrons: a. Hg b. I c. Br d. Cs e. Pt Complete the following table: S Magnesium 14 Ra Complete the following table: Potassium 22 V Barium Answer the following questions: a. What electron sublevel starts to fill after completion of the 3s sublevel? b. What electron sublevel starts to fill after completion of the 4p sublevel? c. What electron sublevel starts to fill after completion of the 3d sublevel? d. What electron sublevel starts to fill after completion of the 3p sublevel?
2 3.104 Answer the following questions: a. What electron sublevel starts to fill after completion of the 5s sublevel? b. What electron sublevel starts to fill after completion of the 4d sublevel? c. What electron sublevel starts to fill after completion of the 4f sublevel? d. What electron sublevel starts to fill after completion of the 5p sublevel? Answer the following questions: a. How many 3d electrons are in Fe? b. How many 5p electrons are in Ba? c. How many 4d electrons are in I? d. How many 7s electrons are in Ra? Answer the following questions: a. How many 4d electrons are in Cd? b. How many 4p electrons are in Br? c. How many 6p electrons are in Bi? d. How many 5s electrons are in Zn? Name the element that corresponds to each of the following: a. 1s 2 2s 2 2p 6 3s 2 3p 3 b. alkali metal with the smallest atomic radius c. [Kr]5s 2 4d 10 d. Group 5A element with the highest ionization energy e. Period 3 element with the largest atomic radius Name the element that corresponds to each of the following: a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 5 b. [Xe]6s 2 4f 14 5d 10 6p 5 c. halogen with the highest ionization energy d. Group 2A element with the smallest ionization energy e. Period 4 element with the smallest atomic radius Of the elements Na, P, Cl, and F, which a. is a metal? b. is in Group 5A? c. has the highest ionization energy? d. loses an electron most easily? e. is found in Group 7A, Period 3? Of the elements K, Ca, Br, and Kr, which a. is a noble gas? b. has the smallest atomic radius? c. has the lowest ionization energy? d. requires the most energy to remove an electron? e. is found in Group 2A, Period 4?
3 Answers 3.93 Give the period and group number for each of the following elements: a. bromine... Period: 4 Group: 7A b. argon... Period: 3 Group: 8A c. potassium... Period: 4 Group: 1A d. radium... Period: 7 Group: 2A 3.94 Give the period and group number for each of the following elements: a. radon... Period: 6 Group: 8A b. lead... Period: 6 Group: 4A c. carbon... Period: 2 Group: 4A d. neon... Period: 2 Group: 8A 3.95 The following trace elements have been found to be crucial to the functions of the body. Indicate each as a metal, nonmetal, or a. Zinc... Metal b. cobalt... Metal c. manganese... Metal d. iodine... Non metal 3.96 The following trace elements have been found to be crucial to the functions of the body. Indicate each as a metal, nonmetal, or a. copper... Metal b. selenium... Non metal c. arsenic... Metalloid d. chromium... Metal 3.97 Indicate if each of the following statements is true or false: a. The proton is a negatively charged particle... False b. The neutron is 2000 times as heavy as a proton... False c. The atomic mass unit is based on a carbon atom with 6 protons and 6 neutrons... True d. The nucleus is the largest part of the atom... False e. The electrons are located outside the nucleus... True 3.98 Indicate if each of the following statements is true or false: a. The neutron is electrically neutral... True b. Most of the mass of an atom is due to the protons and neutrons... True c. The charge of an electron is equal, but opposite, to the charge of a neutron... True d. The proton and the electron have about the same mass... False e. The mass number is the number of protons... False 3.99 For the following atoms, give the number of protons, neutrons, and electrons: a. Cd... Protons: 48 Neutrons: 66 Electrons: 48 b. Tc... Protons: 43 Neutrons: 55 Electrons: 43 c. Au... Protons: 79 Neutrons: 120 Electrons: 79 d. Rn... Protons: 86 Neutrons: 136 Electrons: 86 e. Xe... Protons: 54 Neutrons: 82 Electrons: For the following atoms, give the number of protons, neutrons, and electrons: a. Hg... Protons: 80 Neutrons: 122 Electrons: 80 b. I... Protons: 53 Neutrons: 74 Electrons: 53 c. Br... Protons: 35 Neutrons: 40 Electrons: 35 d. Cs... Protons: 55 Neutrons: 78 Electrons: 55 e. Pt... Protons: 78 Neutrons: 177 Electrons: Complete the following table: Sulfur S Nickel Magnesium Radium Ra Complete the following table: Potassium Vanadium V Cadmium Barium
4 3.103 Answer the following questions: a. What electron sublevel starts to fill after completion of the 3s sublevel?... 3p b. What electron sublevel starts to fill after completion of the 4p sublevel?... 5s c. What electron sublevel starts to fill after completion of the 3d sublevel?... 4p d. What electron sublevel starts to fill after completion of the 3p sublevel?... 4s Answer the following questions: a. What electron sublevel starts to fill after completion of the 5s sublevel?... 4d b. What electron sublevel starts to fill after completion of the 4d sublevel?... 5p c. What electron sublevel starts to fill after completion of the 4f sublevel?... 5d d. What electron sublevel starts to fill after completion of the 5p sublevel?... 6s 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 2 5f 14 6d 10 7p Answer the following questions: a. How many 3d electrons are in Fe?... 6 (26 electrons sixth in d block) b. How many 5p electrons are in Ba?... 6 (56 electrons fifth period filled) c. How many 4d electrons are in I? (53 electrons fourth period filled) d. How many 7s electrons are in Ra?... 2 (88 electrons second in s block) Answer the following questions: a. How many 4d electrons are in Cd? (48 electrons fourth period filled) b. How many 4p electrons are in Br?... 5 (35 electrons fifth in p block) c. How many 6p electrons are in Bi?... 3 (83 electrons third in p block) d. How many 5s electrons are in Zn? (30 electrons tenth in d block)
5 3.107 Name the element that corresponds to each of the following: a. 1s 2 2s 2 2p 6 3s 2 3p 3... Potassium b. alkali metal with the smallest atomic radius... Lithium c. [Kr]5s 2 4d Cadmium d. Group 5A element with the highest ionization energy... Nitrogen e. Period 3 element with the largest atomic radius... Sodium Name the element that corresponds to each of the following: a. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 5... Chromium b. [Xe]6s 2 4f 14 5d 10 6p 5... Astatine c. halogen with the highest ionization energy... Fluorine d. Group 2A element with the smallest ionization energy... Radium e. Period 4 element with the smallest atomic radius... Krypton Of the elements Na, P, Cl, and F, which a. is a metal?... Na b. is in Group 5A?... Na c. has the highest ionization energy?... F d. loses an electron most easily?... Na e. is found in Group 7A, Period 3?... Cl Of the elements K, Ca, Br, and Kr, whichs a. is a noble gas?... Kr b. has the smallest atomic radius?... Kr c. has the lowest ionization energy?... K d. requires the most energy to remove an electron?... Kr e. is found in Group 2A, Period 4?... Ca
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