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
An atom consists of a nucleus, which contains protons and neutrons, surrounded by electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. The number of protons determines the element of the atom, while the number of neutrons can vary (resulting...
Tin is the 49th most abundant element on Earth and has, with 10 stable isotopes, the largest number of stable isotopes in the periodic table, thanks to its magic number of protons. It has two main allotropes: at room temperature, the stable allotrope is β-tin, a silvery-white, ...
The resulting atom: 1) must be very reactive chemically 2) has an atomic number that is one more than that of X 3) has a mass number that is one less than that of X 4) must be radioactive 5) is the same chemical element as X Q13) Radon-222 is a gas produced by alpha decay....
In the Periodic Table, shade/give/label all the elements for which the neutral atom has an outer electron configuration of ms2nd1where n and m are integers and m = n+1 Electronic configuration The electronic configuration of an atom of an el...
Hypoxia-inducible element (HIF): fuel for cancer malignancy advancement. Posted onJanuary 1, 2025 Reply The micropores for the product had been constructed by subsequent annealing. The outcomes of this experiments reveal that the 3DPS-based sensor’s response is highly influenced by temperature, dis...
WO/2001/045206 June, 2001 OMNIDIRECTIONAL ANTENNA UTILIZING AN ASYMMETRICAL BICONE AS A PASSIVE FEED FOR A RADIATING ELEMENT WO/2001/092910 December, 2001 METHOD AND APPARATUS FOR DETERMINIG THE LOCATION OF A PLURALITY OF USERS WO/2002/061467 August, 2002 ELECTROMAGNETIC MODE CONVERSION IN PHOTONIC...
The experiment team collided energetic antiprotons from LEAR with a heavy element, a challenge for them as well as the LEAR operators. Proving that antihydrogen atoms had been formed required several more weeks of data analysis, but the announcement that nine antihydrogen atoms had been produced ...
The most striking of these non-classical phenomena is quantum entanglement (QE), which has been the most debated element of quantum mechanics ever since the theory was formulated about 100 years ago. QE (see e.g., [3]) is the phenomenon that two or more particles can exist in a shared...
If the two-level system is an element of an even higher mega-level, then the more complex this super-system, and, respectively, the more complex the role and behavior of our system as its element, the more often and unpredictable its macrostate changes. Hence, the top-down forces caused...