Chemistry - January 2011

11 What is the total number of electron pairs shared between the two atoms in an O2 molecule?

(1) 1   (3) 6
(2) 2   (4) 4

12 When an atom of lithium loses an electron, the atom becomes a

(1) negative ion with a radius smaller than the radius of the atom
(2) negative ion with a radius larger than theradius of the atom
(3) positive ion with a radius smaller than the radius of the atom
(4) positive ion with a radius larger than the radius of the atom

13 Given the balanced equation representing a reaction:


To break the bonds in NaCl, the reactant must

(1) absorb energy (3) destroy energy
(2) create energy (4) release energy

14 A molecular compound is formed when a chemical reaction occurs between atoms of

(1) chlorine and sodium
(2) chlorine and yttrium
(3) oxygen and hydrogen
(4) oxygen and magnesium

15 Which substance can not be broken down by chemical means?

(1) ammonia  (3) methane
(2) antimony (4) water

 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