百度试题 结果1 题目6 An atom of element Q contains 19 electrons, 19 protons and 20 neutrons.What is Q? B A calcium B potassium C strontium D yttrium 相关知识点: 试题来源: 解析 B 反馈 收藏
How many valence electrons does the element In have, and what are the specific valence electrons...Question:How many valence electrons does the element In have, and what are the specific valence electrons for In?Specifying Electron Position/Location:We normally ...
If an element has two electrons in the first shell and seven in the second shell, the element is said to be what? A. Unstable B. Unreactive C. Stable D. Inert Which of these elements does not cycle through the air? a. nitrogen b. phosphorous c. carbon d. oxygen ...
(Actually, the O-shell could theoretically fit 50 electrons, but there is no known element with this many electrons.) How atoms become ionized Star-forming regions in space like the Orion Nebula pictured here are home to budding stars. Ultraviolet light from these young stars carves a cavity ...
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Chapter 25/ Lesson 3 124K Discover the arithmetic sequence definition and how math uses it. Know its formula and how to solve problems relating to it through sample calculations. Explore our homework questions and answers library Search Browse ...
Silicon has total 14 electrons in its isolated atom. The first orbit consists of 2 electrons. The second orbit consists of 8 electrons and the third orbit consists of 4 electrons. As there are four electrons in the outer most orbit of a silicon atom, the silicon is a tetravalent element....
Lithium is the metal of choice for many solid-state batteries due to the element's high energy density and low binding energy. Structurally, these widely used batteries use lithium ions (Li+) in their cathode and electrolyte, while their anode is often made of graphite or silicon. Why lithiu...
An ion from a given element has 50 protons and 48 electrons. What is the charge on the ion? What is the name of the element? What is the symbol for the ion? An ion from a given element has 17 protons and 18 electrons. What is the charge on the ion? What is the name of the ...
What is the symbol and charge of the element with 31 protons, 39 neutrons, and 28 electrons? Which element in MnSO_4 is a metal? (a) Mn (b) S (c) O. An atom of an element has the following ground-state configuration: Ar 3d10 4s2 4p6. If the element is in Group VIA, what...