Matters are made up of molecules, and molecules of atoms. (用高级短语替换are made up of)consist of2. Professor Smith, along with his assistants, are working on the project day and night to meet the demands.(改错)are改成is3. She is in a poor Dof health, which worries her mother very...
Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules. Examples of such elements are oxygen and chlorine.What...
Yes, cells are made up of atoms. Cell contains different parts. Each part and subpart is made up of compounds and/ or different molecules. Compounds...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
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atoms as that ofnitrogen.之和分别是第五段For example, nitrogen, chlorine, fluorine, orygen, and hydrogen are all gases whose molecules have two atoms each.和第九段Bromine, like its neighbours chlorine and iodine in the periodic ( = of period )table, has molecules made up of two atoms ...
For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What's ...
Well, we have been talking about "chemicals" (the material world in general) and their behaviors, assuming that they can be understood in terms of atoms and molecules. Hopefully, you will agree with chemists by the time you finish reading this book, that yes, the ideas of atoms and ...
Atoms are units of matter that possess chemical and physical properties capable of classifying them as elements. These are considered the basic building blocks of the universe because atoms form molecules which comprise all the different kinds of matter we see....
How do atoms make molecules and compounds? Atoms are a bit like people: they usually prefer company to being alone. A lot of atoms prefer to join up with other atoms because they're more stable that way. So hydrogen atoms don't exist by themselves: instead, they pair up to make what...
A naturally occurring unsaturated fatty acid has between one and six double bonds between carbon atoms. Each of these double bonds are separated by two or more single bonds. These types of bonds between atoms prevent the molecules from packing, lowering the melting point. ...