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3r ESO FÍSICA I QUÍMICA ANNA MACIAS RAMON FONT: http://sciencespot.net/ Unitat didàctica 2 L’ENLLAÇ QUIMIC
Activitat 1:  Completa la taulautilitzant la taula periòdica.
Respon aquestes qüestions: Un àtom que guanya un o més electrons tindrà una  càrrega  _______________ . Un  àtom que perd un o més electrons tindrà una  càrrega  __________________  . Un àtom que guanya o perd electrons s’anomena un  ____________ . Un ió positiu s’anomena  ______________  i un ió negatiu s’anomena  _______________ . POSITIVA NEGATIVA IÓ
Què és un enllaç iònic? Àtoms que transfereixen un o més  ________________  a un altre per formar l’enllaç.  Cada àtom es queda amb l`última capa  __________________ . Un enllaç iònic es forma entre un ió  ___________   amb càrrega positiva i un ió  _______________________   amb càrrega negativa. Exemple B1: Sodi + Clor Exemple B2: Magnesi + Iode ELECTRONS COMPLETA METÀL.LIC  NO METÀL.LIC
Exemple B3: Potassi + Iode Exemple B4: Sodi + Oxigen Exemple B5: Calci + Clor Exemple B6: Alumini + Clor
Què és un enllaç covalent? Àtoms que  _________________________ un o més electrons per formar l’enllaç.  Cada àtom queda amb l’última capa ____________________. Un enllaç covalent es forma amb dos_____________________.  Exemple C1: Hidrogen + Hidrogen Exemple C2: 2 Hidrogen + Oxigen COMPARTEIXEN COMPLETA NO METALLS
Exemple C3: Clor + Clor Exemple C4: Oxigen + Oxigen Exemple C5: Carboni + 2 Oxigen Exemple C6: Carboni + 4 Hidrogen

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Enllaç químic ANNA MACIAS FÍSICA I QUÍMICA

  • 1. 3r ESO FÍSICA I QUÍMICA ANNA MACIAS RAMON FONT: http://sciencespot.net/ Unitat didàctica 2 L’ENLLAÇ QUIMIC
  • 2. Activitat 1: Completa la taulautilitzant la taula periòdica.
  • 3. Respon aquestes qüestions: Un àtom que guanya un o més electrons tindrà una càrrega _______________ . Un àtom que perd un o més electrons tindrà una càrrega __________________ . Un àtom que guanya o perd electrons s’anomena un ____________ . Un ió positiu s’anomena ______________ i un ió negatiu s’anomena _______________ . POSITIVA NEGATIVA IÓ
  • 4. Què és un enllaç iònic? Àtoms que transfereixen un o més ________________ a un altre per formar l’enllaç. Cada àtom es queda amb l`última capa __________________ . Un enllaç iònic es forma entre un ió ___________ amb càrrega positiva i un ió _______________________ amb càrrega negativa. Exemple B1: Sodi + Clor Exemple B2: Magnesi + Iode ELECTRONS COMPLETA METÀL.LIC NO METÀL.LIC
  • 5. Exemple B3: Potassi + Iode Exemple B4: Sodi + Oxigen Exemple B5: Calci + Clor Exemple B6: Alumini + Clor
  • 6. Què és un enllaç covalent? Àtoms que _________________________ un o més electrons per formar l’enllaç. Cada àtom queda amb l’última capa ____________________. Un enllaç covalent es forma amb dos_____________________. Exemple C1: Hidrogen + Hidrogen Exemple C2: 2 Hidrogen + Oxigen COMPARTEIXEN COMPLETA NO METALLS
  • 7. Exemple C3: Clor + Clor Exemple C4: Oxigen + Oxigen Exemple C5: Carboni + 2 Oxigen Exemple C6: Carboni + 4 Hidrogen