In response of what like what’s the full clear question
Atomic mass is the number that you get when the protons and neutrons in the nucleus are added together atomic number is the number of protons in the nucleus
I think it is 4. Covalent compound which is named carbon dioxide.
The changing of the composition of rocks by heat pressure or other natural agency.
I paraphrased from a google search :
https://www.google.com/search?q=metamorphism&rlz=1C1GCEU_en___US848&oq=metamorphism&aqs=chrome..69i57j69i61j0l4.3674j0j7&sourceid=chrome&ie=UTF-8