Chem Ch 2.txt

Protons, Electrons, Neutrons

mass=1amu; Positive Charge;atoms of diff elements have diff # protons

Negative Charge; 1 for each proton in all neutral atoms

mass=1amu; no charge(create stability in nucleus); atoms of a given element can have a variable #

atoms of a given element (same # protons) with diff # of neutrons

a mass number; the sum number of protons and neutrons

the blended average weight of an element with isotopes

6.02x10^23 = 1 mole

equal to the atomic mass in g of any element

the sum of the atomic weights of all the elements in the compound

• 72=mass #
• -1=charge
• 35=atomic number

37

36