Elements in a column (up/down) on the periodic table have similiar: * O Properties
Atomic Masses
O Number of neutrons
O Number of protons
Hellzz

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which of the following units is not an official si unit? mole liter kilogram ampere

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.