Chem 20 Review

Question 0

For a molecular compound, how do you find the chemical name

Answer 0

1. Name the first element and add a prefix (not mono)
2. Name the second element, changing the ending to IDE and adding a prefix
   Ex: P4O10 = tetraphosphorus decaoxide

Question 1

What are the prefixes that are used, from 1 to 10?

Answer 1

One – mono
Two – di
Three – tri
Four – tetra
Five – Penta
Six – hexa
Seven – hepta
Eight – Octa
Nine – Nona
Ten – deca

Question 2

How do you find the chemical formula for a molecular compound

Answer 2

1. Write the symbol for the first element, changing the prefix to a subscript
2. Write the symbol for the second element, changing the prefix to a subscript
   Ex: carbon tetrachloride = CCl4(l)