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CHEMICAL BONDS AND WATER
This document discusses different types of chemical bonds: ionic bonds form when one atom transfers an electron to another atom due to differences in electronegativity, while covalent bonds form when atoms share electrons due to similar electronegativity. Ionic bonds result in charged ions, while covalent bonds can be nonpolar or polar depending on electronegativity differences. Water is an example of a polar covalent molecule with partial charges on the oxygen and hydrogen ends. Hydrogen bonds are electrostatic attractions between polar molecules that are stronger than other intermolecular forces.
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CHEMICAL BONDS AND WATER
- 1. CHEMICAL BONDS (atoms joiningtogether) Miss Sofia Paz
- 2. CHEMICAL BONDS Process ofSHARING or TRANSFERRING electrons (attraction) Ionic bond Covalent Bond
- 3. CHEMICAL BONDS Electronegativity valuesof two atom are different... Ionic bonds are formed, electrons are transferred Electronegativity values of two atom are similar.. COVALENT 1.Nonpolar Covalent bonds form when the electronegativity values are very similar. 2.Polar Covalent bonds form when the electronegativity values are a little further apart. Covalent bonds form between two non-metal atoms. IONIC BOND COVALENT BOND
- 4. Ionic bond One atomtransfers an electron to another atom (Electronegativity values of two atom are different)
- 6. Atoms colide and Clstrips Na’s outer electron Cl has 8 electrons on its outer level Na has 8 on its outer level Electric balances have changed.
- 7. Two atoms shareelectrons (Electronegativity values of two atom are similar) Covalent Bonds
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- 11. WATER Polar Covalent Bond Oxygenend of the molecule has a slight negative charge The end with the two hydrogen atoms is slightly positive.
- 12. Two or more atoms held togetherby covalent bonds. # and types of atoms in a molecule # and types of atoms in a molecule How atoms are linked by bonds MOLECULES Atoms and complexes connected by non-covalent bonds such as hydrogen bonds or ionic bonds are generally not considered single molecules
- 13. Chemical reactions Rearrangement ofmolecules. Existing bonds break and new ones form, resulting in the formation of new substances. Release more energy than they absorb Absorb more energy than they release. EXOTHERMIC REACTION Endothermic reaction
- 14. Chemical reactions donot create or destroy atoms, but only rearrange them. These rearrangements usually involve breaking chemical bonds in reactants and forming new bonds in products. Exothermic reaction Endothermic reaction sunlight + 6CO2(g) + H2O(l) = C6H12O6(aq) + 6O2(g) Release more energy than they absorb Absorb more energy than they release Chemical reactions
- 15. The structure ofWater The end with the two hydrogen atoms is slightly positive. Oxygen end of the molecule has a slight negative charge POLAR MOLECULE!!
- 16. The electromagnetic attractive interaction betweenpolar molecules, in which hydrogen (H) is bound to a highly electronegative atom, such as nitrogen (N), oxygen (O) or fluorine (F). Hydrogen bond is not a true bond but a strong dipole- dipole attraction, and should not be confused with a covalent bond
- 17. Q:How can watermolecules be compared to magnets? A:Both water molecules and magnets have opposite poles that cause them to be attracted to each other in a specific orientation.
- 18. Life-Supporting Properties ofWATER WATER H2O Cohesion & Adhesion Temperature Moderation Dissolve Substances Low density of ice
- 19. Life-Supporting Properties ofWATER WATER H2O Cohesion & Adhesion Temperature Moderation Dissolve Substances Low density of ice
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- 21. Life-Supporting Properties ofWATER WATER H2O Cohesion & Adhesion
- 22. Life-Supporting Properties ofWATER WATER H2O Temperature Moderation
- 23. Life-Supporting Properties ofWATER WATER H2O Dissolve Substances
- 24. Life-Supporting Properties ofWATER WATER H2O Low density of ice