Not specifically mentioned, yet, is the chemical level of biological organization. The chemical level includes the lowest three levels of the Pyramid. Specifically, this includes subatomic particles, atoms, and molecules. The most important of these is the atom. An atom is the simplest form of a chemical element, or primary type of matter. A carbon (C) atom, for instance, is the simplest form of the element carbon. The four most common elements (atoms) found in the human body are carbon (C), oxygen (O), hydrogen (H), and nitrogen (N). The subatomic level is the one immediately “below” (sub-) the entire atom. This level consists of three main types of subatomic particles: protons (PROH-tahns), neutrons (NEW-trahns), and electrons (e-LEK-trahns). Each proton has an electrical charge of +1, while each neutron (as its name suggests) is electrically “neutral” (neither positively nor negatively charged). Together, a certain number of protons and neutrons make up the nucleus (NEW-klee-us) or central “kernel” (nucle) of the atom. And orbiting very rapidly around this nucleus are one or more negatively-charged electrons. The carbon atom, for example, contains 6 protons and 6 neutrons within its nucleus. Orbiting around it is a total of 6 electrons. Since the number of positively charged protons in the nucleus always equals the number of negatively charged electrons rapidly orbiting around the nucleus, the net charge of any atom is 0. Thus, the carbon atom, which has a nucleus of charge +6 (from the six protons), and a cloud of electrons with a charge of —6, has a net (overall) charge of 6—6 — 0. Lying just above the atom level is the molecule. A molecule is a combination of two or more atoms held together by chemical bonds. A chemical bond is a linkage created by the sharing or transfer of electrons between the outer surface clouds of atoms. ---------- Biology tutoring on Chegg Tutors Learn about Biology terms like The Chemical Level Of Organization on Chegg Tutors. Work with live, online Biology tutors like Zach J. who can help you at any moment, whether at 2pm or 2am. Liked the video tutorial? Schedule lessons on-demand or schedule weekly tutoring in advance with tutors like Zach J. Visit https://www.chegg.com/tutors/Biology-online-tutoring/?utm_source=youtube&utm;_medium=video&utm;_content=managed&utm;_campaign=videotutorials ---------- About Zach J., Biology tutor on Chegg Tutors: The Ohio State University, Class of 2015 Biochemistry/Biology major Subjects tutored: Biology, Pre-Algebra, Pre-Calculus, Basic Math, Statistics, Geometry, Medicine, Algebra, Physics, Spanish, Calculus, Chemistry, Basic Science, and Biochemistry TEACHING EXPERIENCE While attending The Ohio State Univerisity as an undergraduate, I was a teaching assistant for an introductory physiology class for seven semesters. Informally, I have assisted my peers in learning anything from organic chemistry to anatomy. EXTRACURRICULAR INTERESTS I am currently enrolled as a first year medical student, and I am hoping to one day pursue a career in surgery. I have always enjoyed teaching and sharing my knowledge with others! Outside of academics, I am a self taught guitar player, political junkie, and stock market enthusiast. Want to book a private lesson with Zach J.? Message Zach J. at https://www.chegg.com/tutors/online-tutors/Zach-J-2458491/?utm_source=youtube&utm;_medium=video&utm;_content=managed&utm;_campaign=videotutorials ---------- Like what you see? Subscribe to Chegg's Youtube Channel: http://bit.ly/1PwMn3k ---------- Visit Chegg.com for purchasing or renting textbooks, getting homework help, finding an online tutor, applying for scholarships and internships, discovering colleges, and more! https://chegg.com ---------- Want more from Chegg? Follow Chegg on social media: http://instagram.com/chegg http://facebook.com/chegg http://twitter.com/chegg

• published: 17 Mar 2016
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