What is the symbol and mass number of a neutral atom whose total mass of its electrons is 3.92 x 10^-26 g, while its neutrons have a mass of 9.35 x 10^-23 g? What element has 16 neutrons and a mass number of 31? Write the symbol for the isotope xenon-144 in the f...
What element has 16 neutrons and a mass number of 31? What does the atomic number describe? (a) a number of neutrons (b) atomic weight (c) number of protons (d) mass. How many protons and neutrons does oxygen-17 have? What is its mass number?
Theneutron isslightlyheavierthan theproton. This increases the mass of nuclei with more neutrons than protons relative to the atomic mass unit scale based on12C with equal numbers of protons and neutrons. Thenuclear binding energyvaries between nuclei. A nucleus with greater binding energy has lower...
Some elements have atoms that can include more than one number of neutrons in their nuclei. Isotopes are elements that have the same atomic number (which - as stated above - is what makes them the same element) but different Mass Numbers (A), due to different numbers of neutrons in ...
Thanks to these bonds, our world is made of a rich variety of elements, ranging from hydrogen – the very lightest, with one proton and up to two neutrons, all the way up to uranium – the heaviest naturally occurring element, with 92 protons and 146 neutrons in its most common isotope...
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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
Protons have a relative mass of 1, which is the same as the relative mass of neutrons. The number of protons in an atom is called the 'Atomic Number' of that atom and is sometimes referred to as 'Z'. This is important because it defines the type of atom, i.e. which element it ...
An observer in the rest frame, not moving with the fluid, sees the moving fluid element adχ contracted by the Lorentz factor γ. Therefore, the FLRW metric becomes de-Sitter like:(2)a2d2χ=γ2d2r=d2r1−r2/rH2≡d2r1+2Φ, where Φ is the gravitational potential, which can also be...
Atoms of a single element that have different numbers of neutrons from one another are calledisotopes. A single particle of any element listed in theperiodic tableis an atom. The number of protons present determines an atom's order in the periodic table, along with its name, symbol, and che...