Answer:
3 elements
Calcium,oxygen and hydrogen
Answer:
Explanation:
oxygen is a 15 and nitrogen science chemistry i'm guessing
A good example is the mineral<span> plagioclase. Plagioclase is a member of the feldspar group, but </span>there<span> is more than one type of plagioclase.</span>
They are odourless, colourless monatomic gases with full outer shells
