An atom's structure consists of a central nucleus and an outer cloud-like field that orbits the nucleus. Answer and Explanation: The correct option is D, protons and neutrons. The nucleus is a cluster of both positively-charged protons and uncharged...
Beginning in the 1890s, investigated the attenuation of electron beams passing through matter. This attenuation can have two causes: the electrons can lose their energy by exciting or ionising atoms, or they can be elastically scattered and so change their directions and leave the beam. produced...
原子的中心,即原子核,包含了带正电荷的微粒,称为“质子”。The center, ___ nucleus, of an atom contains positively
Nuclear fission is the splitting of the nucleus of an atom. Only a few elements are suitable for use in this way, the most important ones being Uranium-235, Uranium-233, and Plutonium-239. When a nucleus of one of these elements is struck by a free neutron it breaks down into two lig...
The nucleus of an atom contains protons and neutrons. The nucleus carries a positive electrical charge. Electrons move around outside the nucleus. Electrons are organized into shells, which is a region where an electron is most likely found. Simple models show electrons orbiting the nuclear in a...
What orbits the nucleus of an atom?The Nucleus of an Atom:The nucleus of an atom is the central part composed of protons and neutrons. This is what gives an atom its mass. The number of protons in the nucleus also determines what element the atom will be....
GMAT 考满分题库C中only修饰occupies；E中only修饰后面数字。从句子意思看应该是强调占的体积（数字）小...
The decay constant of a radioactive substance is0.173year−1. Therefore, View Solution With what velocity should an α- particle travel towards the nucleus of a copper atom at a distance of 10−13m from the nucleus of the copper atom? View Solution With what velocity should an α- pa...
nucleus a proton, meaning "first" in Greek because Rutherford saw it as the first building block for all atoms. Today we know that protons (and neutrons) are formed from even smaller particles, quarks, and that the nucleus of an atom is made from protons and neutrons (with the exception ...
When does a neutron from one atom collides with the nucleus of another atom, a chain reaction can occur. (分数:2.00) 填空项1:___ (正确答案:正确答案:does--去掉does) 相关知识点: 试题来源: 解析 解析:解析:考查从句。此句的when引导时间状语从句,时间状语从句中,when后应直接跟主语,does多余。