Atomic Structure And Electrons Structure Of An Atom What Are Atoms Neutrons Protons Electrons

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Atomic Structure And Electrons Structure Of An Atom What Are Atoms Neutrons Protons Electrons

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Atomic structure. In this video we are going to go over atomic structure in very simplistic and basic way. Atoms are the basic unit of chemical elements. They contain subatomic particles in their nucleus and in the electron cloud that surrounds the nucleus. These subatomic particles include protons and neutrons, which are located in the nucleus, and electrons, which are located in the cloud, or field that surrounds the nucleus. Protons have positive electrical charge, neutrons are uncharged, and electrons have negative charge. The number of protons and electrons are equal, so atoms are electrically neutral particles. If we look at model of the element carbon, which has 6 protons, 6 electrons, and in most cases 6 neutrons, we can see the electrons in simple rings or shells surrounding the nucleus. Each shell represents different energy level, and it can only hold certain maximum number of electrons. In chemical reactions between atoms, only the electrons in the outermost shell participate in the resulting chemical bond. In atoms with only one energy level or shell, 2 electrons are required for stability. If we look at helium, which has only 1 shell or energy level, we see that it is full, because it contains 2 electrons. So helium is stable, and there is no naturally occurring compound containing helium. Hydrogen, which also has only one ring or shell, possesses only one electron in its shell, so it is chemically reactive. In atoms with more than one energy level or shell, 8 electrons are required in its outermost shell for stability. So, neon, which has 8 electrons in its outermost shell, is stable, and oxygen, which has only 6 electrons in its outmost shell, is chemically reactive. Atoms that do have fewer than 8 electrons in their outermost shells, will try to share, gain, or lose electrons in order to become stable. This is called the octet rule, but there are some exceptions, such as we saw with hydrogen and helium which only have one energy level or shell. And that, be the basics on atomic structure.
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