He isn’t good at science. He has no idea ___ an atom is.A. whoB. whichC. whatD. that 相关知识点: 试题来源: 解析 C 题目考查疑问代词在宾语从句中的用法。原句需要表达“他不知道原子是什么”,宾语从句“___ an atom is”需要带有疑问意义的引导词。**选项分析:**1. **A. who**:...
Science is a social process in which the community's scrutiny(监视) ensures we have the best available knowledge. "Best available" does not mean "definitive", but the best we have until we find out how to improve it.The long history of evolution(量子) shows how science is a process ...
How is the nitrogen-15 isotope different from the nitrogen-14 atom? What does suitable control mean in an experiment to investigate the effects of different light intensities on rate of photosynthesis? How to identify the control group? The experimental group?
What does the atomic symbol represent? Chemical Element: A chemical element is defined as a particular type of atom, which can be identified by the amount of protons the element holds in its nucleus. The number of protons in the nucleus of the atom is what gives the element different traits...
What does the nucleus do? The nucleus was discovered in 1911 by Ernest Rutherford, a physicist from New Zealand, according to theAmerican Institute of Physics. In 1920, Rutherford proposed the name proton for the positively charged particles of the atom. He also theorized that there was a neut...
By small, I really do mean absolutely, nanoscopically tiny: a single atom is hundreds of thousands of times thinner than a human hair, so you have absolutely no chance of ever seeing one unless you have an incredibly powerful electron microscope. In ancient times, people thought atoms were ...
Another way to look at what an atom example is is to see examples of things that arenotatoms. Atoms are units of matter, so by definition, anything that does not consist of matter is not an atom. Light, heat, dreams, and sound are not atoms. ...
Neutrons are about as massive as protons, and are found in the nucleus of the atom alongside protons. While protons have a positive charge and electrons have a negative charge, neutrons have no charge. Much how changing the number of electrons does not change the element itself, changing the...
In these episodes, Peter shares his biggest takeaways from the previous 90 days of guest episodes and how it has influenced his personal and clinical practices. Additionally, Peter breaks down complex episodes and makes the most important points easier to understand. Browse All Podcast Episodes He...
Relating to science, what is chemistry? What does azeotropic mean in physical chemistry? Define water of hydration in chemistry What does chemical compound mean? What does inert mean in chemistry? What is a parachor in physical chemistry?