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解析 1 :the periodic table are seperated into periods,there are 4 groups metals,non-metals,metalloids and noble gases. each group's elements all have atomic number which is the number of protons found in the nucleus of an atom.2: Plutonium is not formed by the death of a star in a su...
Related to periodic:periodic table,periodic wave,Periodic signal pe·ri·od·ic (pîr′ē-ŏd′ĭk) adj. 1.Having or marked by repeated cycles:periodic oscillations. 2.Happening or appearing regularly or from time to time:periodic dental checkups; periodic rain showers. ...
This pictorial periodic table is colorful, fun, and packed with information. In addition to the element's name, symbol, and atomic number, each element box has a drawing of one of the element's main human uses or natural occurrences. The table is color-coded to show the chemical groupings...
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1.explain the layout of the periodic table.includ these words:groups,periods,atomic number,metals non-metals,metalloids and noble gases.2.plutonium has an atomic number of 94.explain why there are no naturally occurring deposits of plutonium on earth. 答案 1 :the periodic table are seperated ...
78.1. THE PERIODIC TABLE 元素周期表 (图片可点击放大) In this section, we will explore the periodic table, which organizes chemical elements and provides valuable information about their properties and relationships. Understanding the periodic...
The article shares a science teacher's activity to get students comfortable with using the periodic table of elements. She challenges her students to create words out of the atomic symbols. To ensure that real words are used, she requires students to use dictionaries to define each word. Studen...
1. The Elements and The Periodic Table(元素和周期表) The number of protons in the nucleus of an atom is referred to as the atomic number, or proton number, Z. The numbers of electrons in an electrically neutral atom is also equal to the atomic number, Z. The total mass of an atom ...
1. The Elements and The Periodic Table元素和周期表The number of protons in the nucleus of an atom is referred to as the atomic