Unit 2 – Atomic Structure and Periodic Table Homework

Unit 2 – Atomic Structure and Periodic Table Homework Atom Basics Practice #1: Complete the following table on a separate sheet of paper Isotope Isotope Number of Number of Number of Atomic Mass Symbol #1 Symbol #2 Protons Neutrons Electrons Number (Z) Number (A) +2 -3 +4 Charge N-15 7 8 7 7 15 14.01amu 0 Se-78 34 44 34 34 78 78.96amu 0 Dy-161 66 95 66 66 161 162.50amu 0 W-185 74 111 72 74 185 183.84amu +2 Bi-206 83 123 86 83 206 208.98amu -3 Atomic Mass Charge Atom Basics Practice #2: Complete the following table on a separate sheet of paper Isotope Isotope Number of Number of Number of Atomic Mass Symbol #1 Symbol #2 Protons Neutrons Electrons Number (Z) Number (A) -1 Atomic Mass F-20 9 11 9 9 20 19.00amu 0 Nb-90 41 49 41 41 90 92.91amu 0 As-73 33 40 33 33 73 74.92amu 0 Te-128 53 75 54 53 128 127.60amu -1 Ti-50 22 28 18 22 50 47.88amu +4 Electron Configuration Practice #1 Give the electron configurations for each of the following elements (i.e. 1s2, 2s2…) Pd Co As Pr I 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d8 1s2 2s2 2p6 3s2 3p6 4s2 3d7 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f3 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p5 Electron Configuration Practice #2 Give the electron configurations for each of the following elements (i.e. 1s2, 2s2…) U Te Ba Fe Er 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f4 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p4 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 1s2 2s2 2p6 3s2 3p6 4s2 3d6 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f12 Electron Configurations Practice #3 1. Give the orbital filling diagram for Calcium ↑↓ 1s ↑↓ ↑↓ ↑↓ ↑↓ 2s 2p ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 3s 3p 4s 2. Give the orbital filling diagram for Hafnium ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ 1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑_ ↑_ ___ 6s 4f 5d Complete the following chart on a separate sheet of paper: Element Electron Configuration Condensed Electron Configuration [Ar] 4s2 Number of Valance Electrons 2 3. Calcium 1s2 2s2 2p6 3s2 3p6 4s2 4. Arsenic 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3 [Ar] 4s2 3d10 4p3 5 5. Hafnium 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d2 [Xe] 6s2 4f14 5d2 2 6. Gold 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d9 [Xe] 6s2 4f14 5d9 2 7. Neptunium 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f5 [Rn] 7s2 5f5 2 Lewis Dot Diagram