2.4元素—2021-2022学年化学鲁教版九年级上册随堂小测
※题型：单选题※知识点：单选题※试题难度：容易<br>“加铁酱油”“高钙奶粉”中的“铁”“钙”指的是( )<br>A.原子 B.元素 C.分子 D.单质<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/1258afab3dc34edb924bd2b7e1032e64/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/fcf0c773f30c45f8ab2a170b0529dd65/ACC0C0430DD0EF0D91ACEC90B89537BE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>汞在元素周期表中的相关信息如图所示。下列说法中正确的是( )<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/3/73D97730299DC26D4C921114884C6D42.png"><br>A.原子核外有80个电子 B.相对原子质量为200.6g<br>C.汞有毒,是非金属元素 D.图中Y代表的是Ag<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/511100025bb44bb39ffacaa30b894126/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/2176466945bd45c0811b5910267a7663/B74EC2CF4C17433034C5B3D941714C2F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：容易<br>下列关于元素的叙述中,正确的是( )<br>A.元素是质子数相同的一类原子的总称<br>B.同种元素的原子结构和质量完全相同<br>C.元素的种类取决于元素原子的核外电子数<br>D.在化学反应中,元素可分而原子不可分<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/4f4405fc5dd348459e048dd90b6a3877/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：较易<br>地壳中含量最多的金属元素、非金属元素和空气中含量最多的元素组成的化合物是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/28/6F97D46305AA50551CF0E81D2F1B4AAF.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/28/0125C0E265985712A3A9CAA2643B9043.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/28/505EFC442E0C222779661ED4B879C33E.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2021/6/28/CB2DA3EC548D54680F1E652C40645733.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/6c3700493583413c85a809a6cc12b45f/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/be6c8a73bcae4c79941693495d6e88e0/152AD169458B1245FEE594422DD33A36.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列说法正确的是( )<br>A.只含有一种元素的物质一定是单质<br>B.化合物中一定含有不同种元素<br>C.混合物一定由不同种分子构成<br>D.由两种或两种以上元素组成的物质一定是混合物<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/5/2021/7343b672d7d34830b608d0aa87ea8870/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/5/2021/60acba206d6a4ebb97349cdcc77a300d/7D035E8A1AD6D09B21E44A58C457B702.png"><br><br>
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