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基本卷 原子量:H一1 C—12 N一14 0—16Na一23 S一32 Cl一35.5 K一39 Ca一40FeJ56 Cu一64 Mn一55 Ba一137 一、选择题 1.下列现象属于化学变化的是( ). (A)液化空气制氧气 (B)水凝结成冰 (c)氧气变成淡蓝色液氧 (D)结晶水合物受热时失去结晶水 2.化学变化中的最小微粒是( ). (A
The basic volume of atomic weight: H - 1 C - 12 N - 14 0 - 16 Na - 23 S - 32 Cl - 35.5 K - 39 Ca - 40 FeJ 56 Cu - 64 Mn - 55 Ba - 137 First, multiple choice questions 1. The following phenomena are chemical changes Yes (). (A) Oxygen for liquefied air (B) Water condenses to ice (c) Oxygen becomes light blue Liquid oxygen (D) Crystalline hydrate loses crystal water when heated 2. The smallest particles in chemical change are (). (A