Chapter 2 Atoms molecules and Ions Learning Material

Chapter 2. Atoms, molecules and Ions 第二章 原子, 分子與離子 Learning Material for Technical English 科技英文導讀教材

Part A. Vocabulary and Phrase 2. 5 THE MODERN VIEW OF ATOMIC STRUCTURE: AN INTRODUCTION

English • • Nucleus Electron Proton Neutron 中文翻譯 • • 原子核 電子 質子 中子

English • • Isotope Mass number Atomic number Element symbol • Vanadium 中文翻譯 • • 同位素 質量數 原子數 元素符號 • 釩(元素)

• Isotopes are identified by: – Atomic Number (Z) – number of protons – Mass Number (A) – number of protons plus number of neutrons

Part A. Vocabulary and Phrase 2. 6 MOLECULES AND IONS

English 中文翻譯 • Chemical bond • Covalent bond • 化學鍵 • 共價鍵 • Ionic bond • 離子鍵

Covalent 共價的 1. 詞性: 形容詞 (adj. ) 2. 唸唸看: Co-va-lent Atom (請讀出聲音) Molecule

Part A. Vocabulary and Phrase 2. 7 AN INTRODUCTION TO THE PERIODIC TABLE

English 中文翻譯 • Periodic table • Metal • Nonmetal • 週期表 • 金屬 • 非金屬 • Groups (Families) • Periods • 族 • 週期

English 中文翻譯 • Alkali metals • 鹼金族金屬 (1 A) • Alkaline Earth Metals • 鹼土族金屬 (2 A) • Halogens • Noble gases • 鹵素族 • 稀有氣體 (7 A) (8 A)

B. Readins

• Law of conservation of mass Mass is neither created nor destroyed in a chemical reaction ( ).

• Isotopes ( ) are atoms with the same number of protons ( ) but different number of neutrons ( ).

• Covalent bonds ( ) form between atoms by sharing electrons ( ). • Ionic bonds ( ) form due to force of attraction between oppositely charged ions.

• Ion ( ) is atom or group of atoms that has a net positive or negative charge ( ). • Cation ( ) is positive ion which lost electron(s). • Anion ( ) is negative ion which gained electron(s).