Houston Community College

CHEM 1311

The page numbers and Sample Exercises, etc. are provided based on the 13th and 14th editions of whole
textbooks listed above. Both used hard copy textbooks are available from eBay and any online bookstores.
Both textbooks are for one-year, two-semester General Chemistry I & II courses (CHEM 1311 & CHEM 1412).
Instructor does not have HCC custom-made editions. Central Library has the 13th edition for student use
either in library or to check out. Please master the concepts of all questions except the ones with * for
instructor’s exams.
Multiple Choices: Select ONE Best Answer. 40 questions
Chapter 7 (Q1 – Q17), Chapter 8 (Q18 - Q26), Chapter 9 (Q27 – Q40)
Page and sect provided are based on 13th & 14th editions.
1. In which set of elements would all members be expected to have very similar
chemical properties?
A) Os, Sr, Se
B) Ni, Os, Fr
C) Na, Ni, K
D) S, Se, Al
E) Ne, Ar, Kr
2. Which of the following explains that the atomic radius of main-group elements
generally decreasesacross a period?
A) effective nuclear charge increases across a period
B) effective nuclear charge decreases down a group
C) effective nuclear charge zigzags down a group
D) the principal quantum number of the valence orbitals increases
E) both effective nuclear charge increases down a group and the principal quantum number
of the valence orbitals increases
3. Of the following, which gives the correct order for atomic radius for Mg, Na, P, Si
and Ca?
A) Mg > Na > P > Si > Ca
B) Ca > Si > P > Na > Mg
C) Si > P > Ca > Na > Mg
D) Ca > Na > Mg > Si > P
E) P > Si > Mg > Na > Ca