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There is no life without water. In this chapter, water will be offered to testimonial some very an easy ideas in chemistry, particularly as uses to cell and molecular piersonforcongress.comlogy. What is water? H2O. 2 hydrogen atoms and also one oxygen atom (Figure (PageIndex1)). With each other they kind a molecule of water. They are identified as a molecule by the presence of solid chemical bond connecting every atom.

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Sharing electron is not the only way to produce bonds in between atoms. Ionic bonds are created when one atom donates or receives an electron, rather than sharing one. When an atom provides up an electron, the electrical balance between the numbers of positive charged protons in that is nucleus and negatively charged electrons is upset, and the as whole atom now has actually a positive electrical charge. Similarly when an atom receive an extra electron, the balance in a neutral atom is upset, and the atom becomes negatively charged. One ionic bond is formed when one atom donates an electron come an surrounding atom, developing an ionic pair, one positively and one negative charged. The electrical attraction between the oppositely charged atoms holds castle together.