Identify each of the following transformations as a chemical or physical change: burning leaves and melting ice

Fe2(SO4)3 is called  

The formula for a molecule formed from Aluminum and nitrate would be

Potassium has_____________valence electron(s).

The correct name of the compound  NCl3 is

The formula for a molecule formed from Na and O would be.

The name for Cu(NO2)2 is:

 The strongest interactions between atoms of helium, He, are examples of

Sulfur has 16 valence electrons.

Write the chemical name for each chemical formula. MgSO4[name1] Mg(HSO3)2[name2]