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F2-5 Formative Feedback duration 12 minutes 24 seconds F2-5 Formative Feedback F2-5 Formative Feedback	F2-5 Formative Feedback electrons valence electron protons shell charge guys bit thing left column lot hydrogen helium elements groups things 2x chlorine beryllium From Travis Price 0 likes 1,589 plays 0
F2-4 Formative Getting Started duration 8 minutes 57 seconds F2-4 Formative Getting Started F2-4 Formative Getting Started	F2-4 Formative Getting Started electrons protons charge bit energy proton carbon guy worksheet calcium shell electron 2x nucleus ion hydrogen increases orbitals content level From Travis Price 0 likes 2,832 plays 0