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
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 and vertical columns called groups in the increasing order of their atomic...
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...
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Which of these elements has seven valence electrons? a. Mg b. Li c. Al d. S e. Cl What are the first 20 elements of periodic table (group wise)? What family on the periodic table of elements has a full outer electron shell?
What are the representative elements? In what region(s) of the periodic table are these elements found? 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...
Minerals are crystals that are naturally formed of various elements under intense conditions. In the case of kyawthuite, scientists concluded during their study that the gem primarily contains bismuth (a silvery pinkish metal), antimony (a silvery bluish white metal or metalloid), and tetraoxygen ...
mobile genetic elements and toxin–antitoxin system were detected and identified as potential survival mechanism features inRhodobactersp. Rb3. In total, these results reveal a wide set of strategies used by the isolate to adapt and thrive under environmental stress conditions as a model of polyextr...
These compounds may also be generally designated as the sulfides, selenides or tellurides of the acyloxyaromatic (or aroxyacyl) carboxylic acids, preference being given to such compounds in which the acyl group corresponds to an oxy inorganic acid (such as phosphorous acid). In other words, ...
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 o...