Chemistry, 15.07.2019 00:00 j015

A)state the number of valence electrons for the element o? b) an element with 5 protons, has how many electrons? c) if an element has 4 electrons and an atomic mass of 9, what element is it? d)chlorine has two naturally occurring isotopes: cl-35 and cl-37. which isotope is more abundant if the atomic mass of chlorine is 35.45?

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A)state the number of valence electrons for the element o? b) an element with 5 protons, has how ma...

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