Chem Ch 2.txt
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3 particles in an atom:
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
Each Isotope has
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
molecular weight of a compound
the sum of the atomic weights of all the elements in the compound
- 72=mass #
- 35=atomic number
How many neutrons with a mass of 72 and atomic number of 35?
How many electrons with a atomic number of 35 and charge of -1?
How many protons in an atomic number of 35?
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