24 Part of the Periodic Table is shown.□W XY ZWhich row correctly describes the properties of elements W, X, Y and Z? C has four has variable reacts with very outer shell oxidation states cold water unreactive electrons AW YZ XB XW YZ CZ WY XD ZY XW 相关知识点: 试题来源: 解...
题目20 Part of the Periodic Table is shown.□W XY ZWhich row describes W, X, Y and Z? B metal non-metal AX W, Y and Z BX and Y W and Z CW and Z X and Y DW, Y and Z X 相关知识点: 试题来源: 解析 B 反馈 收藏
20 Part of the Periodic Table is shown.□X YZ Which row describes the properties of X, Y and Z? C good conductor high melting of electricity point AX ZB YZ and X CYand Z ZD Z and X X 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
结果1 题目 21 Period 3 of the Periodic Table is shown.Na Mg AL Si PS Cl Ar What increases from left to right across Period 3? C A density B melting point C non-metallic character D the number of electron shells 相关知识点: 试题来源: 解析 C 反馈 收藏 ...
A1 Fig. 1.1 shows part of the Periodic Table. Only some of the elements are shown.H CN ONa Mg AlSi PK Ca Fe CuZn Rb Fig.1.1(a) Each element may be used once, more than once or not at all.Use the symbols used in the diagram.Give one element which(i) has a giant molecular str...
百度试题 结果1 题目A25 Part of the Periodic Table is shown.W YX ZWhich of the elements W, X, Y and Z would react together least violently? B A WandY B Wand Z C X and Y D X and Z 相关知识点: 试题来源: 解析 B 反馈 收藏 ...
shown byionization potential,electron affinity,oxidation-reduction potential, the energy of formation of chemical bonds, and other properties. It is shown to depend upon the element’s position in the periodic table in the same way that nonmetallic character does, fluorine being the most ...
The lanthanides and actinides refer to the two families of mostlyradioactive metalsin an off-shoot of the periodic table. Usually, they are shown as two rows on a separate section. The top row houses lanthanides, which are elements 57 – 70. The bottom row contains actinides, elements 89...
In fact, subsequent work has shown something. 子句类型: 主句 连接词: 分句-1 In a periodic table, elements should not be ordered strictly by atomic mass. 子句类型: 宾语从句 连接词: THAT 3. 句子成分 主句 In fact, [状语] subsequent work [主语] has shown [谓语] something. [宾语]...
20 The elements in Period 3 of the Periodic Table are shown.Na Mg Al Si PS CL Ar Which statements about the elements in Period 3 are correct?A1 Na, Mg and Al are metals.2 S, CI and Ar are non-metals.3 Si, P and S are metals. A 1 and 2 only B 1 and 3 only C 2 and ...