A. A very small particle that makes up matter B. A large object in space C. A form of energy D. A type of wave 相关知识点: 试题来源: 解析 A。“Atom”在科学中意为“原子”,是构成物质的非常小的粒子;B 选项“a large object in space”指“太空中的大物体”;C 选项“a form of energ...
Most of an atom is empty space. If an atom were about as big as a baseball stadium, the nucleus would be the size of a pea in the very center and the electrons would be somewhere on the outside edge.What makes an atom of gold different from an atom of iron is the number of ...
In the world of chemistry, an atom is matter, which makes up everything that is tangible (items you can touch) in the world. One important property of an atom is that it can't be broken down any further with any type of chemical means because it is in its simplest form. What Are ...
You can't see atoms, but they make up everything around you: your chair, your desk, the birds outside, even you!Atomsare the foundation of matter, which is everything that makes up the universe around us. Each kind of atom makes up a pure substance called an element. You may have ...
Atoms are the basic units of matter. Everything in the universe apart from energy is made of matter therefore atoms make up everything in the universe, according toNorthwestern University. The term "atom" comes from the Greek word for indivisible, because it was once thought that atoms were ...
Since the beginning of time, human beings have sought to understand what the universe and everything within it is made up of. And while ancient magi and philosophers conceived of a world composed of four or five elements – earth, air, water, fire (and m
If you could keep dividing it into smaller and smaller pieces, you would finally get to the smallest piece of gold possible. It is called an atom. If you divided it into smaller pieces, it would no longer be gold. Everything around us is made of atoms and scientists so far know of ...
A very simple atom model. It's not to scale but helpful for understanding how an atom is built. A core nucleus of protons and neutrons is surrounded by orbiting electrons. Every atom must have at least one proton in it. The number of protons in an atom is important, because it defines...
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Unfortunately, approximately 60% of people in the United States have a genetic mutation that makes it challenging for their bodies to create enough of the methylation vitamin 5-MTHF. When the methylation switch is turned off and isn’t creating enough SAMe, then a number of important molecules ...