百度试题 结果1 题目CovalentBond() CovalentBond() A. 氢键 B. 离子键 C. 次价键 D. 共价键 相关知识点: 试题来源: 解析 D 反馈 收藏
A coordinate covalent bond is a pair of electrons shared between two atoms which originated on one of the atoms;a covalent bond is a shared pair of electrons. Once formed, there is no difference between them. In an ammonium ion there are four covalent bonds,one of which is a coordinate ...
Polar covalent bond or polar bond is a covalent bond with greater electron density around one of the two atoms
What is an ionic bond and a covalent bond?Answer and Explanation: An ionic bond is a bond formed whenonly one of its atoms or moieties transfer theelectrons, while covalent bond is formed when both atoms (or moeieties) shared their valence electrons to form the bond. An example of ionic...
What is the difference between an ionic bond and a covalent bond?相关知识点: 试题来源: 解析 An ionic bond is formed when electrons are transferred from one aton to another to form negative and positive ions.A colvalent bond is formed when electrons are shared between two atoms....
The definition of a covalent bond is a chemical link between two atoms or ions in which the electron pairs are shared.
电子 ___ 二、单词短语英译中(每小题 1 分,共 15 分) (1) carbonate ___ (2) monoxide___ (3) amino acid ___ (4) aromatic___ (5) protein ___ (6) covalent bond___ (7) raw material___ (8) chemical shift ___ (9) solute ___ (10) oxygen ___ (11) monatomic ___ (1...
The learning process of scientific concepts has been investigated and discussed in several studies in recent decades. However, the understanding of this process may be different depending on the psycho-pedagogical approach adopted. From the perspective of the conceptual profile, the same concept can ...
Covalent bond formation between a DNA-cytosine methyltransferase and DNA containing 5-azacytosine. DNA containing 5-azacytosine (azaC) has previously been shown to be a potent inhibitor of DNA-cytosine methyltransferases. In this report, we describe experiments which demonstrate that azaC-DNA forms a...
百度试题 结果1 题目1 Which is the shortest covalent bond? A A H-H□ B H -N C H-S D H -Br 相关知识点: 试题来源: 解析 A 反馈 收藏