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下列关于分子原子和离子的叙述中不正确的是a它们都是电中性的粒子b原子可以构成分子原子和离子之间能够相互转化c它们都能直接构成物质d Template






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tomski下列关于分子原子和离子的叙述中不正确的是a它们都是电中性的粒子b原子可以构成分子原子和离子之间能够相互转化c它们都能直接构成物质d coloring
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关于分子原子和离子的认识不正确的是 A．分子原子和离子都是构成物质的微粒B．原子得到或者失去电子形成离子C．分子是由原子或者离子构成的 sketch template
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下列关于分子和原子的说法中不正确的是 A．分子和原子都在不停地运动B．分子和原子都是构成物质的微粒C．原子是不能再分的最小微粒D．水分子是 sketch template
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关于分子原子离子的下列说法中错误的是 A 分子原子离子都是在不断运动的粒子B 分子是由原子构成的一种粒子C 分子原子 sketch template
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化学式在分子原子层次上研究物质的性质组成结构与变化规律的学．1如图1是物质元素粒子之间的关系图回答下列问题如图中空白方框 sketch template
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初中化学原子结构示意图与离子结构示意图试题 优题课 sketch template
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原子核原子核图片原子核 文秘图库 sketch template
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某反应的微观示意图如图所示每一种小球代表一种元素的原子．下列判断不正确的是 A．分子和原子都是构成物质的微粒B．图示的反应属于分解反应 sketch template
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有关钠原子钠离子的结构示意图的以下说法中错误的是 A．钠原子有三个电子层钠离子有两个电子层B．钠原子和钠离子的质子数都为11C．一个 sketch template
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氯原子的结构示意图如图所示下列有关说法错误的是 A氯原子的核电荷数为17B氯原子最外层有7个电子C氯原子的质子数为17D在化学 sketch template
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阴离子阳离子区分口诀是什么 百度经验 sketch template
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氢原子的结构图 千图 sketch template
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下列关于原子的叙述正确的是 一切原子都是由质子中子和电子构成的原子在不停地运动原子是化学变化中的最小拉子原子由原子核和核外电子 sketch template
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下列操作或现象与分子对应的特性不一致的选项是 选 项 操作或现象 分子的特性 A 给篮球充气 分子间有间隙 ——青夏教育精英家教—— sketch template
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对下列所示的微粒结构示意图下列说法正确的是 A它们都是原子 B它们都属于稳定结构 C它们都是离子 D它们都是同一种元素 9下列 sketch template
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下列物质的化学式书写不正确的是 A氧化镁 MgO2B氧化钠 Na2OC硫酸锌 ZnSO4D氢氧化铜 CuOH2 题目和参考 sketch template
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如图是氧元素的原子结构示意图则下列说法错误的是 A核内有8个质子B最外层电子数为6个C氧元素在化合物中的化合价通常为 2价D氧 sketch template
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下列说法正确的是 A．18克水中含有氢气的质量为2克B．2克H2和32克O2充分反应后生成34克H2O C．4m个H2O分子和m个 sketch template
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下列关于空气的说法中不正确的是 A．可以从空气中分离得到氧气B．氮气约占空气体积分数的78%C．空气是由多种物质组成的混合物D．直接焚烧 sketch template
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工业酒精中常含有甲醇甲醇有剧毒不能食用其分子结构可能如图所示的模型表示．下列有关甲醇的叙述中错误的是 A甲醇的化学式为CH4OB sketch template
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7．农作物的种子经过酵蒸馏制得的乙醇被称为“绿色汽油 乙醇的分子结构如图所示．则 下列叙述正确的是 A．乙醇分子是由3种元素组成的 sketch template
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钠原子和钠离子的结构示意图如下请回答1由于它们的原子核内质子数相同所以它们都属于钠元素．2钠原子和钠离子的化学性质不相同． 题目 sketch template
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下列关于原子分子和离子的描述中不正确的是 A 它们都是电中性的微粒B 它们都是保持物质化学性质的微粒C 它们都能直接构成物质D sketch template
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题目根据下列五种粒子的结构示意图回答下列问题1图中粒子共表示 种元素2图中表示阴离子的是 3化学性质相似的粒子是 sketch template
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下列关于生物大分子的叙述中不正确的是 A．蛋白质是以氨基酸为基本单位构成的生物大分子 B．核酸是储存遗传信息控制蛋白质合成的生物大分子 C sketch template
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关于原子分子离子的说法中不正确的是 A．原子不能直接构成物质 B．分子可以保持物质的化学性质 C．原子的质量主要集中在原子核上 D．属 sketch template
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关于原子结构的叙述正确的是 A．所有的原子核都是由质子和中子组成的B．原子的最外层电子数不超过8个C．稀有气体原子的最外层电子数均为8D sketch template
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下列有关物质用途的叙述中不正确的是 A． 工业酒精可用来勾饮用酒 B． 加碘食盐可用来防治碘缺乏病C． 铝和铜可用来制作导线 D． 可用聚氯 sketch template
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加热一定量的高锰酸钾固体制氧气下图所示的四个图象能正确表示对应变化关系的是 A．B．C．D．——青夏教育精英家教—— sketch template
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下列现象或事实用微粒的相关知识加以解释其中不正确的是 现象或事实 解释A热胀冷缩 原子或分子大小随温度改变而改变B酒香不怕巷子深分子不断地 sketch template
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RQ为短期中的两种元素R元素原子的最外层电子数与次外层电子数之差的绝对值等于电子层数Q元素的原子比R元素的原子多2个核外电子则下列 sketch template
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题目下列实验操作中正确的是 A倾倒液体B点燃酒精灯C检查装置气密性D过滤 题目和参考答案——青夏教育精英家教—— sketch template
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题目下列有关化学符号“ 表示的意义正确的是 A二氧化碳这种物质B二氧化碳由碳原子和氧原子构成C一个二氧化碳分子含有一个氧分子D sketch template
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下列关于属晶体的叙述正确的是 A． 常温下属单质都以属晶体形式存在 B． 属离子与自由电子之间的强烈作用在一定外力作用下不 sketch template
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2008年国北京国际汽车展中自主研的一种氢动力概念车这种车最理想的燃料是氢气氢气在空气中燃烧的化学方程式为 但氢动力汽车目前还 sketch template