January 2017 Chemistry Regents #31-35

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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 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85
 

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31 Which electron configuration represents the distribution of electrons in a potassium atom in the ground state?

(1) 2-8-8-1 (3) 2-8-5

(2) 2-8-7-2 (4) 2-7-6 

1   2-8-8-1

 

see PT cell for element K...not P

32 At STP, which element is malleable and a good conductor of electricity?

(1) xenon (3) platinum

(2) silicon (4) hydrogen

3   which is a metal?  left side of PT
33 Which general trends in atomic radius and electronegativity are observed as the elements in Period 3 are considered in order of increasing atomic number?

(1) Atomic radius decreases and electronegativity increases.

(2) Atomic radius increases and electronegativity decreases.

(3) Both atomic radius and electronegativity increase.

(4) Both atomic radius and electronegativity decrease.

1   left to right

I.E. increases and so does EN

 

34 What is the chemical name for Na2SO3?

(1) sodium sulfite (3) sodium sulfide

(2) sodium sulfate (4) sodium thiosulfate

1   sodium sulfate
35 Which molecular formula is also an empirical formula?

(1) C6H6 (3) N2H4

(2) H2O2 (4) N2O5

4   lowest whole number ratio...which can not be reduced any lower?

 

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 51-53 Questions 54-55
 Questions 56-57 Questions 58-59 Questions 60-61 Questions 62-65  Questions 66-68  Questions 69-72  Questions 73-77 Questions 78-79 Questions 80-82 Questions 83-85
 

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