百度试题 结果1 题目34 Which group of elements contains a metalloid? (3)(1) Group 8(3) Group 16(2)Group 2(4) Group 18 相关知识点: 试题来源: 解析 (3) 反馈 收藏
Which of the following categories includes two-thirds of all elements? a. metalloids b. metals c. liquids d. nonmetals Types of Elements in the Periodic Table: The periodic table is an arrangement of elements into various horizontal rows called periods...
What family on the periodic table of elements has a full outer electron shell? Which is the most reactive element in the period table? Which of the elements in the following periodic table are lanthanides? In period 2 of the periodic table, which group contains...
Which of the following is true regarding the inner transition elements? A. Their valence electrons can be located in both s and f sublevels. B. They occupy the d block of the periodic table. C. These Which category of elements is listed below the...
When freshly cut, lead is silvery with a hint of blue; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is a relatively un...
To determine which of the given compounds may be classified as an aryl halide, we need to understand the definition of aryl halides. Aryl halides are compounds where a halogen atom (such as fluorine, chlorine, bromine, or iodine) is directly bonded to
Examples o acyl chlorides of the inorganic acids of non-metallic or acidic metalloid elements that may be used in the acylation reaction mentioned above are the following: POC13, PSCI, BCla, SiCl4, PC13, PCIs, as well as the corresponding bromides and iodides. Representative examples of...
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Elements belonging to which group of the periodic table form ions with a 2+ charge? a. alkaline earth metals b. alkali metals c. chalcogens d. halogens Periodic Table: The elements are arranged in the increasing ...
Plants are an indispensable part of nature and are the first to be affected when the soil environment is contaminated with heavy metals. When plants are excessively exposed to multiple metal elements, such as Cd, Cr, Hg, Pb, As, copper (Cu), nickel (Ni), iron (Fe), and antimony (Sb...