A. A large chemical molecule. B. A dead chemical. C. An active virus. D. A living cell. 相关知识点: 试题来源: 解析 D 正确答案:D 解析:细节题。题干意为“是什么让一个病毒有了生命?”。由文章第一段第二句“Yet,when a virus is placed on a living thing it comes to life.”可知病...
A molecule's molecular weight is the sum of all its constituent atoms' atomic weights. Avogadro's number (6.02214076 × 1023) is the number of molecules that constitutes the atomic weight of a molecule in grams (g). For example, water is two hydrogen atoms with a weight of 1 g each an...
Molecule C. Cell D. Organ 相关知识点: 试题来源: 解析 A。解析:原子(Atom)是物质的最小单位。分子(Molecule)由原子组成;细胞(Cell)是生物体的基本结构和功能单位;器官(Organ)是由细胞和组织构成的。从语法上这是关于物质基本单位的特殊疑问句,选项为不同物质或生物结构名称。
What Makes a Single Molecule Magnet? ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a Chem... NT Madhu,JK Tang,IJ Hewitt,... - 《Cheminform》 被引量: 0发表: 2006年 Unravelling the Spin Dy...
3What do you think of mRNA?① It is a special molecule.2 It can help the body fight many diseases.3 Many scientists showed interest in it later.④ The human body usually fought it off. A.①②③ B.②3④ C. ①②④ D.①③④ 相关知识点: 试题来源: 解析 答案见上 反馈 收藏...
What is an atom in a molecule? J Phys Chem A The derivation of the Hirshfeld atoms in molecules from information theory is clarified. The importance for chemistry of the concept of atoms in molecules (AIM) is stressed, and it is argued that this concept, while highly useful, consti......
What Makes a Single MoleculeMagnet?. Madhu N.T,Tang Jin-Kui,Hewitt Ian J. et al. Polyhedron . 2005Madhu, N. T,T, Jin-Kui,Hewitt, Ian J,Clerac, Rodolphe,Wernsdorfer, Wolfgang,van Slageren, Joris,Anson, Christopher E,Powell, Annie K.What makes a single molecule magnet?.Polyhedron. ...
What makes a molecule polar? Which molecule has polar bonding and is nonpolar? What electronegativity is polar? What molecule is PHB? What does it mean when a molecule is said to be polar? What is a polar covalent bond? Is CH3OCH3 a polar molecule?
DNA is made up of molecules called nucleotides. Each nucleotide contains three components: a phosphate group, which is one phosphorus atom bonded to four oxygen atoms; a sugar molecule; and anitrogenbase. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytos...
A molecule is a group of two or more atoms joined by chemical bonds, whereas a compound is a substance formed by the chemical bonding of more than one type of element that exists in a fixed proportion.