百度试题 结果1 题目10 An isotope of element Y has 19 protons and 20 neutrons in its nucleus. Which is the symbol for the ion of Y? B2039A YB19192039C YD1919 相关知识点: 试题来源: 解析 B 反馈 收藏
Which element has the second-highest electronegativity? ___. Electronegativity: The electronegativity of an atom of an element is a measure of the force with which the atom pulls on the shared electrons in a covalent bond. The index is important to investigate t...
A bromine ion contains 35 protons, 35 neutrons, and 36 electrons. What is the net charge of the ion? For a neutral atom of element 37, what would be the probable ground-state electronic configuration? In your expression for the configuration, list the subshells in order of filli...
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. The number of protons determines the element of the atom, while the number of neutrons can vary. Electrons exist in energy levels or shells around the nucleus. 开学特惠 开通会员专享超值优惠 助力考试高...
Hint: Each of the ions has a different number of protons, but each has one electron, so the Bohr model How many electrons in an atom can have each of the following quantum number or sub level designations? n=4, l=3A certain element has its outermost el...
mass.For example, tellurium comes before iodine in the periodic table, even though its atomic mass is slightly greater.Such anomalies are due to the relative abundance of the "isotopes" or varieties of each element.All the isotopes of a given element have the same number of protons, but ...
甲供应商向同一项目中的乙、丙两家专业分包单位供应同一型号材料，两份供货合同对材料质量标准均未约定。乙主张参照其他企业标准，丙主张执行总承包单位关于该类材料的质量标准，甲提出以降低价格为条件，要求执行行业标准，乙、丙表示同意，则该材料质量标准应达到( )。
The isotopes of a given element have the same chemical properties but slightly different physical properties. We now know that atomic number (the number of protons in the nucleus), not atomic mass number (the number of protons and neutrons), determines chemical behavior.Mendeleyev went further ...
Which element below includes six electrons in its Lewis symbol? a. Cr b. Ni c. Ba d. Se e. As In the Lewis structure for ICl2^(3-), how many lone pairs of electrons are around the central iodine atom? A) 0 B) 1 C) 2 D) 3 E) 4 ...
a. A six-carbon sugar. b. A phosphate group. c. A nitrogenous base. Which of the following options is correct? Isotopes of an element a. have the same number of protons. b. have the same number of neutrons. c. have fewer ...