材料工程導論 第一次作業 繳交期限:即日起自 2022 年 9 月 28 日下午三點前以電子檔線上繳交 檔名注意請以固定格式:系別_學號_姓名 HW1 繳交 2.8 Define (a) atomic number,(b) atomic mass,(c) atomic mass unit (amu),(d) mass number,(e) isotopes,(f) mole,(g) relative atomic mass , (h) average relative atomic mass , and (i) Avogadro’s number. 2.14 Describe the following terms ( give a diagram for each ) : (a) electron density diagram , (b) orbital , (c) boundary surface representation,and (d) radial probability. 2.18 Describe the terms (a) metallic radius,(b) covalent radius, (c) first ionization energy,(d) second ionization energy,(e) oxidation number,(f) electron affinity,(g) metals,(h) nonmetals, (i) metalloids,and (j) electronegativity. 2.47 Determine if the following combinations of quantum numbers are acceptable. (a) n = 3,ℓ = 0,mℓ = +1 (b) n = 6,ℓ = 2,mℓ = -3 (c) n = 3,ℓ = 3,mℓ = -1 (d) n = 2,ℓ = 1,mℓ = +1 2.52 Write the electron configuration of the following ions using the spdf notation : (a) Cr2+,Cr3+,Cr6+;(b) Mo3+,Mo4+,Mo6+; (c) Se4+,Se6+,Se2-.