This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Problem Set 1 ANSWER KEY BILD1 / Winter 2010 Chapters 1-4 Traver 1) Which four elements make up approximately 96% of living matter? D) carbon, hydrogen, nitrogen, oxygen 2) What do these four elements have in common? 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. A) protons and neutrons 4) The atomic number of neon is 10. Therefore, an atom of neon D) only A and B are correct. Questions 5-7 Refer to Figure 1. Figure 1 5) Which drawing depicts the electron configuration of an atom of neon ( 20 10 Ne) ? E 6) Which drawing depicts the electron configuration of oxygen ( 16 8 O) ? C 7) Which drawing depicts an atom with a valence of 3? B 8) The reactive properties or chemical behavior of an atom depend on the number of D) electrons in the outer valence shell in the atom. 9) What are the chemical properties of atoms whose valence shells are filled with electrons? E) Both C and D are correct. 10) What is the valence of an atom with six electrons in its outer electron shell? B) 2 11) A covalent chemical bond is one in which C) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. C) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms....
View Full Document
This note was uploaded on 03/31/2010 for the course BIOLOGY BILD 1 taught by Professor Traver during the Winter '10 term at UCSD.
- Winter '10