Without your notes: write the electron arrangement, then the number of core and valence electrons.
L02.2 Do Now
Sodium · Z = 11 · neutral
Lesson 4 · Core & valence electrons
No notes — answer from memory, even if you have to guess. Retrieving is what makes it stick.
Without your notes: write the electron arrangement, then the number of core and valence electrons.
L02.2 Do Now
Core vs valence electrons.
L02.2