Determine the oxidation number of the underlined element in the following ion. Be sure to indicate if the oxidation number is positive or negative. (HSO2)-1

Which of the following choices best classifies the following reaction:  Mg   +    2 HBr     MgBr2   +  H2 a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

On a separate sheet of paper, draw the Lewis dot structure for (NO2)-1. After completing the exam, upload your picture in the Unit 2 Exam pictures dropbox. 

According to the chemical naming system, which name is incorrect? Formula:                 Name: SnCl4               tin chloride SCl2                       sulfur dichloride Mg(NO3)2        magnesium nitrate Na2(CO3)         sodium carbonate FeBr2               iron (II) bromide  

Which of the following choices best classifies the following reaction:  Na2S+   Pb(NO3)2    PbS  +  2 Na(NO3) a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

Hydrogen bonding is a special type of dipolar force that occurs when hydrogen is bonded to what 3 possible elements? (Use appropriate symbols for the elements. Use commas to separate the symbols)

Which of the following represents the correct order of increasing inter-molecular strength?

Which of the following electronic changes will cause a Group VIA (16) element to achieve a noble gas configuration?

Which of the following choices best classifies the following reaction:  Mg   +    2 HBr     MgBr2   +  H2 a. combination b. single replacement c. decomposition d. double replacement  e. redox f.  nonredox

Balance the equation below by placing the correct coefficients in the blanks. Your response should list the coefficients in order from left to right, separated only by commas; no spaces. If no coefficient belongs in a blank, represent it with a “1”. For example the equation 2 H2O  → 2 H2 +O2 would be represented as 2,2,1. ____ Rb(OH)  + ____H3(PO4) →  ____Rb3 (PO4) + ____H2O