Copper (Cu) is a metal that is commonly used for electrical wiring. Determine both the number of moles of atoms and the number of atoms in a 1.35 g samp of copper
HOW DO WE GET THERE?
How many moles are present in the 1.35-g sample of copper?
mol Cu

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent