Chemistry - June 2011

Part B–1

31 Compared to the atoms of nonmetals in Period 3, the atoms of metals in Period 3 have

(1) fewer valence electrons
(2) more valence electrons
(3) fewer electron shells
(4) more electron shells

32 Which elements are malleable and good conductors of electricity?

(1) iodine and silver    (3) tin and silver
(2) iodine and xenon   (4) tin and xenon

33 Which atom in the ground state requires the least amount of energy to remove its valence electron?

(1) lithium atom        (3) rubidium atom
(2) potassium atom   (4) sodium atom

35 What is the percent composition by mass of sulfur in the compound MgSO4 (gram-formula mass = 120. grams per mole)?

(1) 20.%    (3) 46%
(2) 27%     (4) 53%

 Previous Page Next Page

EduSolution -
Helping Students
to succeed!
Vistors' Comments

This is one of the absolute best sites I've found online, and I say that as a teacher who has spent countless hours looking for kid-friendly material on the net. I have no idea how you found the time and energy to put it together, but you have my admiration! - Andrew Cowells, Concord Jr. High