Problem Set 1 S07

Problem Set 1 S07 - Problem Set 1 Chapters 1-4 BILD1 Spring...

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Problem Set 1 BILD1 / Spring 2007 Chapters 1-4 Dr. Kiger 1) Which four elements make up approximately 96% of living matter? A) carbon, sodium, chlorine, nitrogen B) carbon, sulfur, phosphorus, hydrogen C) oxygen, hydrogen, calcium, sodium D) carbon, hydrogen, nitrogen, oxygen E) carbon, oxygen, sulfur, calcium 2) What do these four elements have in common? A) They all have the same number of valence electrons. B) Each element exists in only one isotopic form. C) They are equal in electronegativity. D) They are elements produced only by living cells. E) They all have unpaired electrons in their valence shells. 3) The mass number of an element is the sum of the number of _________ in an atom of that element. 4) The atomic number of neon is 10. Therefore, an atom of neon Questions 5-7 Refer to Figure 1. Figure 1 5) Which drawing depicts the electron configuration of an atom of neon ( 20 10 Ne) ? 6) Which drawing depicts the electron configuration of oxygen ( 16 8 O) ? 7) Which drawing depicts an atom with a valence of 3? 8) The reactive properties or chemical behavior of an atom depend on the number of
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