June 2018  Chemistry Regents #6-10

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6 Which element is classified as a metalloid?

(1) Cr      (3) Sc

(2) Cs      (4) Si

4 staircase elements...not Al
7 Which statement describes a chemical property of iron? 

(1) Iron oxidizes.

(2) Iron is a solid at STP.

(3) Iron melts.

(4) Iron is attracted to a magnet.

1 look for a reaction, not a phase change
8 Graphite and diamond are two forms of the same element in the solid phase that differ in their

(1) atomic numbers

(2) crystal structures

(3) electronegativities

(4) empirical formulas

2 different substances, different properties, different structures

 

9 Which ion has the largest radius?

(1) Br-     (3) F-

(2) Cl -      (4) I-

4 since they are all 1- in charge

the atomic radius will have a similar trend

10 Carbon monoxide and carbon dioxide have

(1) the same chemical properties and the same physical properties

(2) the same chemical properties and different physical properties

(3) different chemical properties and the same physical properties

(4) different chemical properties and different physical properties

4 different substances, different properties, different structures

 

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

Questions 51-53 Questions 54-56 Questions 57-59 Questions 60-62 Questions 63-65 Questions 66-69 Questions 70-73 Questions 74-76  Questions 77-79  Questions 80-82  Questions 83-85 

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