推荐回答(2个)
1.1
1、C 2、时间 力 东风 电阻 速度 体积 3、D 4、C 5.A 6.D 7.A 8.没有 没有 间隔
1.2 (1)
1.C 2.C 3.A 4.B 5.(2) (3) (2) (1) (4) 6.1 2 2 2 分裂 重新组合 发生 不发生 分子 原子 原子 7.D 8.A 9.D 10.(1)水是由水分子构成的 (2)分子在化学变化中可以变成原子 (3)原子是化学变化中最小的微粒 (4)分子是保持物质化学性质的最小微粒
1.2(2)
1. (1)(2)(3)\(1)(4) 2.A 3.C 4.D 5.A 6.B 7.氧分子 8.C 9.B 10. 2H 可以做电极
1.3(1)
1.D 2.C 3.C 4.(1)分子和原子 (2)分子和原子 (3)分子和原子和中子 (4)质子和原子核 (5)电子 (6)原子核 (7)质子和电子 (8)分子 5.原子中核电荷数等于核外电子数 核电荷数等于质子数 质子数与中子数不一定相等 6.D 7.B 8.A 9.B
1.3(2)
1.C 2.C 3.D 4.B 5.错 对 对 6.A 7.D 8.D 9.C 10.B
1.3(3)
1.B A.D 2.D 3.C 4.D 5.B 6.A 7.氯化钠——离子 冰——分子 干冰——分子 铁——原子 石墨——原子 8.金属原子容易失去电子形成相对稳定的结构 非金属原子容易得到电子形成相对稳定的结构 氯化钠是由离子构成的 9.(1)2+ 2- 3- (2)金属阳离子都带正电荷 一般来说,非金属阴离子和原子团带负电荷
1.4
1.D 2.C 3.A 4.D 5.D 6.(1)元素 化合物 (2)单质 化合物 原子 原子 7.(1)(4)(5)(7)8.(1)组成 构成 (2)组成 构成 (3)组成 构成 构成 9.C 10.B
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