When an atom or molecule absorbs an X-ray photon, an electron can be ejected. The kinetic energy (KE) of the electron depends upon the photon energy (hν) and the binding energy (BE) of the electron (i.e., the energy required to remove the electron from the surface). By measuring ...
The antonym of “atom” is ___. A. molecule B. particle C. compound D. element 相关知识点: 试题来源: 解析 C。“atom”意为“原子”,“compound”意为“化合物”,与“atom”相对。“molecule”分子;“particle”粒子;“element”元素,都不是“atom”的反义词。反馈...
The water molecule is___two hydrogen atoms and one oxygen atom.水分子由二个氢原子和一个氧原子构成。(p.19Chemical Structure第3-4行) ▲ make up of常用被动式,意为“由……所组成”。如:①The train was made up of 15 coaches.这列火车有15节车厢。②All living matter is made up of cells...
13. The water molecule is___two hydrogen atoms and one oxygen atom. 水分子由二个氢原子和一个氧原子构成。(p.19 Chemical Structure 第3—4行) ▲ make up of常用被动式,意为“由……所组成”。如:1 The train was made up of 15 coaches. 这列火车有15节车厢。2 All living matter is made ...
The atomic weight of an atom, or the molecular weight of a molecule, is its mass relative to that ofa___ atom. This is essentially equal to the number of protons plus neutrons that the atom or molecule contains. A oxygen B hydrogen C helium D carbon 相关知识点: 试题来源: 解析 B ...
5 Atom X is the central atom in a molecule.In this molecule, atom X has four pairs of valence electrons in its outer shell.The four pairs of valence electrons include at least one bond pair and at least one lone pair.What could be a possible shape for the molecule? C A linear B no...
49. A molecule of water is made up of two atoms of hydrogen and one atom of oxygen.(改为同义句) A molecule of water two atoms of hydrogen and one atom of oxygen 相关知识点: 试题来源: 解析 【答案】consistsof【核心短语/词汇】bemadeupof 由...组成【翻译】一个水分子是由两个氢原子和...
百度试题 结果1 题目The water molecule is made of two hydrogen atoms and one o___ atom.相关知识点: 试题来源: 解析 oxygen 反馈 收藏
百度试题 结果1 题目The water molecule is made up of two___ (氢)atoms and one___ (氧)atom.相关知识点: 试题来源: 解析 marched 反馈 收藏
wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M.Jeffrey H. BanningNan-Xing HuJames D. MayoJames M. DuffRoger E. Gaynor...