SME
Grade 10 Science
Atomic structure and isotopes
The main lesson, then each kind of problem it solves.
Atomic structure and isotopes
Main lesson
Ions: gaining and losing electrons
Use this to find an ion’s charge from its protons and electrons, or the electrons from its charge.
Average atomic mass from isotopes
Use this for “Boron is 19.9% boron-10 (10.01 u) and 80.1% boron-11 (11.01 u). Find its atomic mass.”
Models of the atom, in order
Use this for “How did the model of the atom change, and what evidence changed it?”