Answer Guide Unit S3_5C

MCQ Answer  Area of Chemistry
1.  C  [Electron Arrangement]
2.  C  [Gas Tests – Oxygen]
3.  D  [Diatomic elements]
4.  B  [Atomic Structure/ Nuclide notation]
5.  D  [Chemical Formula – Prefixes]
6.  A  [Electron Arrangement/ Properties of Elements/ Groups in Periodic Table]
7.  A  [Substances]
8.  A  [Gas Tests -Hydrogen]

 

9.
a) molecules composed of only two atoms (covalently bonded)
b) hydrogen/ nitrogen/ oxygen/ fluorine/ chlorine/ bromine/ iodine
 10.

Picture2

11.  O2-,  Na+  
 12.  
Screen Shot 2015-12-21 at 19.43.17  HIGH
Screen Shot 2015-12-21 at 19.44.06  LOW
Screen Shot 2015-12-21 at 19.44.14 HIGH
Screen Shot 2015-12-21 at 19.44.21  LOW

 

 

13. a) N2 b) Al c) H2
d)  Cl2 e)  Br2  f)  H2O
g) CCl4 h) NF3 i) SiBr4
j) SiO2 e) SiO4 f) N2O4
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