Chemistry

Chemistry, 11.07.2019 04:40, chickenhead123

1. how many valence electrons are in an atom of phosphorus? (atomic number 15) a. 2 b. 3 c. 4 d. 5 2. how many electrons does barium have to give up to achive a noble-gas electron configuration? a. 1 b. 2 c. 3 d. 4 3. which of the following elements does not form an ion with a charge of 1+? a. fluroine b. hygrogen c. potassium d. sodium

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