June 2014 Chemistry Regents #6-10

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Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-54 Questions 55-56 Questions 57-58 Questions 59-61 Questions 62-65 Questions 66-69 Questions 70-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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6 The atomic mass of magnesium is the weighted average of the atomic masses of

(1) all of the artificially produced isotopes of Mg

(2) all of the naturally occurring isotopes of Mg

(3) the two most abundant mtif1cially produced isotopes of Mg

(4) the two most abundant naturally occurring isotopes of Mg

2linkdefinition of atomic mass

7 Which element has atoms that can form halide ions?

(1) iodine (3) strontium

(2) silver (4) xenon  		1linkgroup 17 are the halogens

halogens gain an electron and form halide ions

8  Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their

(1) atomic numbers

(2) crystal structures

(3) isotopic abundances

(4) percent compositions

2linkAllotropes are different forms of the same element. They have different structures and therefore different properties.

 

9  Which quantity can be calculated for a solid compound, given only the formula of the compound and the Periodic Table of the Elements?

(1) the density of the compound

(2) the heat of fusion of the compound

(3) the melting point of each element in the compound

(4) the percent composition by mass of each element in the compound

4linkgiven a formula, the mass of the part and whole formula can give you the % mass of each element in a compound
10 Which terms identify types of chemical reactions?

(1) decomposition and :sublimation

(2) decomposition and synthesis

(3) deposition and sublimation

(4) deposition and synthesis

2link

link2

phase changes are NOT chemical reactions

 

 

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Question 51-54 Questions 55-56 Questions 57-58 Questions 59-61 Questions 62-65 Questions 66-69 Questions 70-72 Questions 73-75  Questions 76-79  Questions 80-82  Questions 83-85

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