Answer:
-1.42, -0.375, 32.5% (.325), 3/8 (.375), √4 (2.0), 3 (3.0), 2³ (8.0)
An element is made up of only one type of atom.
a compound is when 2 or more atoms bond together.
elements are organized on the periodic table.
have a chemical symbol describes an element.
properties of elements describes how an element looks feels and acts.
a compound is described when its components keep separate properties.
hope I helped much!
Lets look at the example
Cu(SO4)2
SO4 means 1 atom of S and 4 atoms of O
(SO4)2 means 2*1 atom of S and 2*4 atoms of O, so we get
2 atoms of S and 8 atoms of O.