Identifier des erreurs lors d'une dilution: Uritiser le matériel de manière adaptée.
Pour faire une dilution, un élève réalise la manipulation
schématisée ci-dessous.
• Identifier les erreurs commises par l'élève.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.