Atoms and atomic theory
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English-for-Chemistry-1-After-lesson-1
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disagree to some extent concerning which elements belong in this category, but the elements in yellow boxes in the image on the right are commonly classified as metalloids. The portion of the periodic table that contains the metallic elements is shown here in gray, and the portion that contains the nonmetallic elements is shown in light blue. The stair-step line that starts between B and Al on the periodic table and descends between Al and Si, Si English in chemistry 1 – 2017 TS. Nguyễn Tuyết Phương – TS. Trần Thu Phương 6 and Ge, and so on separates the metallic elements from the nonmetallic elements. The metals are below and to the left of this line, and the nonmetals are above and to the right of it. Most of the elements that have two sides of their box forming part of the stair-step line are metalloids. Aluminum is usually considered a metal. Q1. Complete the following statements by writing one of these words or phrases in each blank extended or shaped group gain metals lose metalloids metallic halogens nonmetals period 1. The periodic table is arranged in such a way that elements in the same _______ have similar characteristics. 2. Atoms in group 1 and 2 tend to _______ electrons. 3. Atoms in group 17 tend to _______ electrons. 4. Metals are malleable, hence they are able to be __________ by the blows of a hammer. 5. The elements in group 17 given in the periodic table are known as __________. 6. At room temperature and pressure, __________ show a variety of characteristics can be gas, solid or liquid. 7. __________are generally ductile, good conductors of heat and electricity, and have a lustrous or shiny appearance. 8. __________ are chemical elements which have properties in between those of metals and nonmetals. tải về 0.52 Mb. Chia sẻ với bạn bè của bạn:
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