The main sources you should use for your project is the Ducksters.com page and ThoughCo page for your assigned element. You may also use other sources if needed, but make sure they are accurate and reliable.
Magnesium (Ducksters) (ThoughtCo)
Nickel (Ducksters) (ThoughtCo)
Nitrogen (Ducksters) (ThoughtCo)
Oxygen (Ducksters) (ThoughtCo)
Phosphorus (Ducksters) (ThoughtCo)
Potassium (Ducksters) (ThoughtCo)
Silicon (Ducksters) (ThoughtCo)
Silver (Ducksters) (ThoughtCo)
Sodium (Ducksters) (ThoughtCo)