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Bonds turn elements into compounds Ionic bonds neutral atom: #p = #e -

Bonds turn elements into compounds Ionic bonds neutral atom: #p = #e - ion = an atom with a charge Metals lose electrons easily. Bonds turn elements into compounds Ionic bonds neutral atom: #p = #e - ion = an atom with a charge Metals lose electrons easily

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Bonds turn elements into compounds Ionic bonds neutral atom: #p = #e -

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  1. Bonds turn elements into compounds • Ionic bonds • neutral atom: #p = #e- • ion = an atom with a charge • Metals lose electrons easily

  2. Bonds turn elements into compounds • Ionic bonds • neutral atom: #p = #e- • ion = an atom with a charge • Metals lose electrons easily • become positive + ions • Ex. Neutral sodium Na: 11 p + 11 e- = 0 charge • If Na loses its 1 valence e- • Then it has: 11 p + 10 e- = 1+ charge

  3. What neutral element Has 10 electrons?

  4. Nonmetals gain electrons easily

  5. Nonmetals gain electrons easily •  become negative ions • Ex. chlorine Cl: 17 p + 17 e- = 0 charge • If Cl gains 1 valence e- from Na, • Then it has: 17 p + 18 e- = 1- net charge • Pos. and neg. ions attract each other • They form ionic bonds after Na transfers an e- to Cl • Ex. Na+ + Cl- NaCl = ionic compound - + - +

  6. What neutral element Has 18 electrons?

  7. Positive ions like Na+ are called cations. • Negative ions like Cl- are called anions.

  8. Positive ions like Na+ are called cations. • Negative ions like Cl- are called anions. • Solids made from them are called ionic solids. • Ex. Calcium Ca atom: 20 p + 20 e- = 0 charge • If Ca loses 2 e-  20 p + 18 e- = 2+ cation • Oxygen O atom: 8 p + 8 e- = 0 charge • If O gains 2 e-  8 p + 10 e- = 2- anion • Then: Ca2+ + O2-  CaO aka lime •  ionic solid

  9. Lime: CaO or CaOH D’Albiney employed a stratagem against them, which is said to have contributed to the victory: Having gained the wind of the French, he came down upon them with violence; and throwing in their faces a great quantity of quicklime, which he purposely carried on board, he so blinded them, that they were disabled from defending themselves

  10. NaCl:

  11. Ionic Solids: 1/ form “cube” crystals 2/ are brittle and break easily 2/ melt at high temperatures 3/ conduct electricity when dissolved in water

  12. Atoms want to be like the noble gases. metals nonmetals noble gases Group #1 2 ••• 16 17 18 # valence e- 1 2 6 7 8 Gain e- & become 1- or 2- lose e- & become 1+ or 2+ noble gas noble gas

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