B.WrongC.Not mentioned 相关知识点: 试题来源: 解析 B解析:这句话是错的,答案在第二段第二句:An atom of ordinary carbon,called carbon-12,has six protons(质子) and six neutrons(中子) in its nucleus.…普通的碳原子有6个中子。反馈 收藏 ...
Describe the structure of an atom.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
Since the atomic mass of Sodium is 23, we can also write it as 23 g/mol.Therefore, we conclude that Option B is the correct answer.Additional Information:The atomic number of a chemical element is the number of protons found in the nucleus of every atom...
1 题目：The hydroxide ion, OH−, has a total of 9 protons.How many neutrons and electrons are there in this ion?题目难度：容易 考点分析：求neutrons，electrons和protons之间的关系 题目分析：hydroxide ion有9个protons，带负一价电，所以electrons数量比protons多一个，为10个，立马就把答案B给选出来...
Furthermore, photophysical properties were assessed with 0.1% sodium dodecyl sulfate additive to characterize the dyes, avoiding any possible dye aggregation effects (Supplementary Table 1). The absorption maxima of the obtained dyes are in the range from 500 to 720 nm, and the corresponding ...
Which statements help to explain this trend from sodium to aluminium? 1 The charge on the metal ion increases. 2 There are more delocalised electrons per metal ion. 3 The radius of the metal ion decreases. 36 Under room conditions, 600 3 cm of a gas, X, has a mass of 0.700 g. ...
1d). This finding indicated the higher decomposition efficiency in ESM by oeMtaker with the addition of sodium sulfite. Sodium sulfite has been known to have the ability to reduce chemical crosslinking. Acting as a reducing agent, it will convert the disulfide bond into two sulfonic acid groups...
【Atomic structure】 1.1 Particles in the atom and atomic radius 1 understand that atoms are mostly empty space surrounding a very small, dense nucleus that contains protons and neutrons; electrons …
Low-selective CO2 photoreduction systems are often overlooked in research, because the resulting mixed products are difficult to use in further reactions. In particular, the reutilization of gaseous hybrid products (such as CO and H2), which are often mi
Surprisingly, one of the attempts to model theN-glycosylation reaction resulted in tautomerization of the amide group of Asn30via one oxygen atom of the α-phosphate. In other words, one of the amide protons transferred to Oαand, subsequently, the amide carbonyl abstracted the proton from Oα...