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A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. What is the atomic number of chlorine? A) 8 B) 17 C) 35 D) 52 Two atoms with the same atomic number but different neutron numbers are called ___. Si a. Is this an atom, molecule, or compound? b. What is the nam...
An element is a fundamental item that can't be easily broken into smaller pieces. In chemistry and physics, an element is a substance that can't be broken down by non-nuclear reactions. In computing and mathematics, an element is a distinct piece of a larger system or set. Elements in ...
Elements are substances made from only one kind of atom, such as gold or oxygen. If a substance is a combination of atoms from two or more elements, it is called a compound. Answer and Explanation:1 Si is the chemical symbol for the element silicon, one of the most abundant elements on...
Question: Is water heterogeneous or homogeneous? Water Water is a compound that is made from atoms of hydrogen and oxygen combining with each other. Water is one of our most important resources and is necessary for life. Answer and Explanation: ...
Many ionic compounds contain a bond between a metal and a nonmetal. When naming ionic compounds, the first name is the metal in the compound. It is given the element name, which can be found on the periodic table. The second name is the nonmetal. T...
Single-cell suspensions of BM cells, splenocytes or PB cells were stained using standard procedures. Cells were adjusted to 2 Â 107 cells/ml in PBS with 2% FBS and 0.1% sodium azide, and 1 Â 106 cells were incubated 30 min on ice with appropriately diluted antibodies (1 ng/ml)...
The processability which is improved the ABS compound which possesses high gloss 来自 百度文库 喜欢 0 阅读量: 13 申请(专利)号: JP特願2001-562627(P2001-562627) 申请日期: 20010212 公开/公告号: JP特表2003-524052(P2003-524052A)A 公开/公告日期: 20030812 ...
What is the oxidation state of Pb in PbO_{2}? What is the oxidation number of Cr in K_2CrO_4? What is the oxidation number of magnesium in the compound Mg(OH)2? What is the balanced equation for the oxidation of the iron(II) ion by permanganate?
If the formula of an oxide of element X is XO, what is the formula of the nitride of X? How do you tell if a compound is ionic or covalent by its formula? What is the formula for the compound that forms between the barium ion and the oxide ion?