By Eric J. Simon
Eric Simon’s Biology: The middle combines a 12-chapter textbook and powerful content material in MasteringBiology® to supply a versatile new educating and studying package deal that engages you with concise writing, appealing and powerful visuals, and remarkable interactive electronic assets.
This application deals an cutting edge instructing and studying event through aiding teachers and scholars:
Revolutionize instructing out and in of the study room: the original hybrid integration of the e-book with MasteringBiology permits your teacher the pliability to coach the path simply the way in which they wish through a medium that caters to how you learn.
Emphasize the massive photo: The Core’s concise modules concentration your awareness at the most vital thoughts and inspire you to determine the relevance of biology to daily life. each one module presents simply enough info that will help you comprehend the subject.
Achieve a uncomplicated figuring out of biology: The center combines dynamic figures and illustrations with helping narrative because the fundamental resource of guide to create a extra attractive and available studying event. enticing and powerful actions in MasteringBiology assist you extra visualize and comprehend advanced organic methods.
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Additional info for Biology: The Core
Examples of elements include hydrogen, carbon, and gold. Although elements are occasionally found by themselves—neon gas that lights up a sign, for example, is just a collection of atoms of the element neon—they more often combine to form compounds, substances with two or more elements in a fixed ratio. I t would take over a million carbon atoms to stretch across the period at the end of this sentence. SODIUM CHLORIDE Na + Cl NaCl Atoms of sodium Atoms of chlorine Element: sodium, a metal Element: chlorine, a gas Compound: sodium chloride (table salt) Chemical Reactions The composition of living matter is constantly changing through chemical reactions.
The number of protons determines the element; the number of neutrons determines the isotope; and the number of electrons determines the ion state and chemical reactivity. CORE QUESTION: Carbon always has six protons. How many neutrons and electrons are there in a C-14 isotope? 4 Atoms are held together by chemical bonds Within every living cell, countless chemical reactions between molecules drive the processes of life. During a chemical reaction, atoms gain, release, or share electrons with other atoms.
Because electrons are negatively charged, the atom that receives the electron(s) becomes negatively charged, while the atom that donates the electron(s) becomes positively charged. Both atoms are now ions, an atom or group of atoms that has acquired a charge by the gain or loss of electrons. The two ions in an ionic bond are held together by the attraction of their opposite charges, in a manner similar to the way magnets stick together. Covalent bonds involve the sharing of one or more electrons between atoms.