What is a stable atom? Stability of an Atom: An atom is a microscopic particle made up of even smaller protons, neutrons, and electrons. All the electrons are arranged in a definite pattern of distribution called the electronic configuration. The chemical reactivity of an atom is directly ...
A. A very small particle that makes up matter B. A large object in space C. A form of energy D. A type of wave 相关知识点: 试题来源: 解析 A。“Atom”在科学中意为“原子”,是构成物质的非常小的粒子;B 选项“a large object in space”指“太空中的大物体”;C 选项“a form of energ...
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A steel alloy, on the other hand, is composed of a few different elements. The different sized atoms mixed around in the bond structure cause irregularities in the atomic organization of the material, which makes it makes harder for slips and other deformations to occur. Share Cite Improve ...
An oxygen atom contains eight electrons, arranged into two orbital shells. Electron Situated within the two shells, these subatomic particles have a mass of almost zero and a charge of -1. Unpaired electron Two electrons in the outer shell don’t have a partner. This allows oxygen atoms to ...
In 1911, Ernest Rutherford discovered that at the core of everyatomis a nucleus. Atomic nuclei consist of electrically positive protons and electrically neutral neutrons. These are held together by the strongest known fundamental force, called the strong force. The nucleus makes up much less than ...
A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct characteristic of a pungent smell. Amine In organic chemistry, amines (, UK also ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are ...
It's only about 0.03 eV per atom, but unfortunately it's in the direction of 0.03 lower energy for graphite compared to diamond so, again, diamond is not thermodynamically stable at room temperature and pressure and conventional chemistry techniques don't offer any way to make diamond from ...
this kind of learning appears to have an impact on children's future. a 2021 frontiers in education study showed that montessori education can lead to better adult well-being, especially in these factors: (3) self-confidence engagement social trust general well-being what makes montessori ...
The actual mass of an atom at rest is very difficult to measure, as even the most massive of atoms are too light to express in conventional units. As such, scientists often use the unified atomic mass unit (u) – also called dalton (Da) – which is defined as a twelfth of the mass...