A. Silicon atoms. B. Carbon atoms. C. Oxygen atoms. D. Hydrogen atoms. 相关知识点: 试题来源: 解析 B。解析:文章中明确提到“Graphene is an extremely thin and strong material. It is made up of a single layer of carbon atoms arranged in a hexagonal lattice.”,石墨烯是由一层碳原子组成...
The hydrogen molecule, consisting of two hydrogen atoms, can be used to produce carbon-free energy. Hydrogen molecules carry a lot of energy; a pound of hydrogen contains almost three times the energy of a pound of gasoline or diesel. However, hydrogen molecules are not abundant on Earth, ma...
How is Hydrogen Energy Produced? Hydrogen can be produced using fossil fuels, conventional sources, or some sort of renewable energy source. The most widely adopted technique is steam reforming, where hydrogen atoms are separated from methane. Electrolysis or water splitting is another technique extens...
How many hydrogen atoms would have the same mass as one calcium atom? How many atoms thick is graphene? How does an atom differ from an element? What is the mass number of the uranium-238 atom? What is the lightest particle of an atom?
The basic structure of silicone is made up of polyorganosiloxanes, where silicon atoms are linked to oxygen to create the «siloxane» bond.
What is hydrogenation? Hydrogenation is a chemical reaction between molecular hydrogen and an element or compound, ordinarily in the presence of a catalyst. The reaction may be one in which hydrogen simply adds to a double or triple bond connecting two atoms in the structure of the molecule or...
What are long chains of carbon molecules called? A molecule of water (H2O) is formed by what type of bond? Which subatomic particles are involved in chemical bonding? What types of atoms are involved in ionic bonds? What type of bond joins two hydrogen atoms? What name is given to bonds...
A hydrogen bond is a type of intermolecular bond in which a molecule containing hydrogen is attracted to another molecule other due to slight charge differences. Molecules become charged when some atoms are more electronegative than others and pull the shared electrons closer to them, creating ...
What is green hydrogen, blue hydrogen, and so on? Producing hydrogen takes energy because hydrogen atoms don't exist on their own — they are almost always stuck to another atom, often another element. (On earth, hydrogen is particularly abundant in the form of water, or H2O.) Creating pu...
Atoms are the smallest particles of an element that have the chemical properties of that element. Atoms are therefore extremely small (the hydrogen atom is the smallest) and are sometimes described as the "basic building blocks of matter". This description makes more sense the more chemistry ...