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Chemistry Review

Chemistry Review. Atoms are the smallest part of matter. 3 Particles Electron (e-)  outer shell Proton (p+)  nucleus Neutron (n 0 )  nucleus. Elements are made of the same type of atoms. Molecules are made of more than one type of atom. NaCl (salt) C 6 H 12 O 6 (glucose)

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Chemistry Review

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  1. Chemistry Review

  2. Atoms are the smallest part of matter 3 Particles Electron (e-)  outer shell Proton (p+)  nucleus Neutron (n0) nucleus

  3. Elements are made of the same type of atoms

  4. Molecules are made of more than one type of atom NaCl(salt) C6H12O6 (glucose) HCl (hydrochloric acid)

  5. Probe: Is It Made of Molecules? • Bread DNA protons • Cell membrane water atomic nucleus • Oil brain cell worm • Protein egg sugar • Atom flower blood • Bacteria air mushroom • Electrons fruit cell nucleus • Cloud milk seed • Chromosome leaf skin

  6. How many elements do you think are in this picture? Earth’s Crust = Al, Fe, Si Water = H, O Air = N, O Person = C, H, N, O, P, S

  7. What is a Chemical Bond? • Three students were discussing their ideas about chemical bonds. This is what they said: • Jane: “I think a chemical bond is produced by a molecule. It is a substance made up of matter that holds atoms together.” • Will: “I think a chemical bond is an attraction between atoms. It is not made up of mater.” • Gabe: “I think a chemical bond is a structural part of an atom that connects it to other atoms? • Who do you most agree with and why?

  8. Chemical Bonds join atoms together • 1. Covalent – when atoms share electrons • Examples: • Water • Glucose • carbon dioxide • oxygen gas • hydrogen gas

  9. 2. Ionic Bonding when atomsgain or loseelectrons form compounds

  10. Reactants vs. Products Coefficients Reactants (inputs) Products (outputs)

  11. Model Kits!!!! We will focus on Covalent bonding

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