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Draw Gallium

nucleus. 3. 8. 31. 2. 31. Draw Gallium. 18. electron. Electron Configuration 1s 2 2s 2    2p 6 3s 2    3p 6    3d 10 4s 2    4p 1. Paul Emile Lecoq de Boisbaudran. Your Goals. You should be able to : Identify a substance as an element, compound, or mixture (Level 1-2)

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Draw Gallium

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  1. nucleus 3 8 31 2 31 Draw Gallium 18 electron Electron Configuration 1s2 2s2   2p6 3s2   3p6   3d10 4s2   4p1 Paul Emile Lecoq de Boisbaudran

  2. Your Goals You should be able to: • Identify a substance as an element, compound, or mixture (Level 1-2) • Describe a substance as an element, compound, or a mixture (Level 3-4) • Describe the difference between an element, compound, or a mixture (Level 5-6) • Explain how a substance is identified an element, compound, or a mixture (Level 5-6)

  3. Vocabulary substance mixture element compound matter

  4. Review • Is Gallium a compound or element? How do you know? Where would you look to find out if Gallium is an element? • Is NaOH a compound or element? How do you know?

  5. Elements, Compounds, & Mixtures Mixturesare made of elements and compounds stirred together but NOT bonded Example: You are a mixture because you are not on the periodic table and cannot be written with a chemical formula. Elementscannot be easily broken down specific number of protons in the nucleus Example:Gallium is an element because it is found on the periodic table; the atomic number is 31 Compoundsare made of elements bonded together Example:Water is a compound because it can be written using a chemical formula: H2O

  6. Your Turn: identify each item in the box as an element, compound, or mixture and provide an explanation why.

  7. Identify each part of a chemical equations as an element, compound, or mixture • AgNO3 + NaIAgI+ NaNO3 • HCl + Mg H2+ MgCl2 compound compound mixture compound compound mixture Go back to all of the reactions we did and label the products and reactants as compounds, elements, or mixtures.

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