samplepaper_midterm - Sample(Mid-term Test Paper for Chem...

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Sample (Mid-term Test) Paper for Chem 100 <<General Chemistry>> Multiple choices ( 2 marks each, 40 marks in total ) 1. A sulfide ion, S 2- , has (a) 16 protons and 16 electrons (b) 32 protons and 16 electrons (c) 16 protons and 14 electrons (d) 16 protons and 18 electrons (e) 32 protons and 18 electrons 2. To describe an atomic orbital, how many quantum numbers are required? (a) 4 (b) 3 (c) 2 (d) 1 (e) none of the above 3. An electron in a certain atom is in the n=2 quantum level. Which choice lists possible values of both l and m that it can have? (a) l =2 m =2 (b) l =1 m =2 (c) l =0 m =-1 (d) l =0 m =0 (e) l =2 m =1 4. An atom of manganese has unpaired electrons and is . Atomic number of manganese is 25. (a) 0, diamagnetic (b) 2, diamagnetic (c) 3, paramagnetic (d) 5, paramagnetic (e) 7, paramagnetic 5. Consider an element with an electron configuration of [Kr]5s 2 4d 10 5p 5 . How would you classify this element? (a) a representative element (b) a transition metal (c) an alkali metal (d) an actinide element (e) a noble gas 6. The electron configuration of a Co 3+ ion is: The atomic number of Co is 27. (a) [Ar]3d 5 (b) [Ar]4s 1 3d 5 (c) [Ar]4s 2 3d 4 (d) [Ar]3d 6 (e) [Ar]4s 2 3d 9 7. Which element will display an unusually large jump in ionization energy values between I4 and I5, the 4 rd and 5 th ionization energies? (a) Na (b) P (c) Al (d) Si (e) S 8. Which of the following statements is true? (a) The radii of ions are always smaller than the radii of the corresponding atoms of the same element. (b) The electron configuration of the outermost electrons of atoms of the halogens is ns 2 np 7 . (c) An electron in a 3p orbital could have a value of 2 for its angular momentum quantum number l . (d) Each shell of quantum number n contains n subshells. 9.
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This note was uploaded on 04/04/2010 for the course CHEM 100 taught by Professor Linzhenyang during the Spring '10 term at HKUST.

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samplepaper_midterm - Sample(Mid-term Test Paper for Chem...

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