Chemical elements and compounds

1. To or more convine to form this

2. Compounds

2.1. Are made of molecules

2.2. Homogeneous

2.3. Heterogeneous

2.4. Where can we found chemical compunds?

2.4.1. Food

2.4.2. Batteries

2.4.3. Seawater

2.4.4. Drinks

2.4.5. Acids

2.4.6. And more

3. Elements

3.1. Are made of atoms

3.2. Metals

3.3. Non-metals

3.4. Metalloids

3.5. Where can we found chemical elements?

3.5.1. Earth´s crust

3.5.2. Human boy

3.5.3. Universe

3.5.4. And more