June 2014 Chemistry Regents #1-5

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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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1 Compared to the charge of a proton, the charge of all electron has

(1) a greater magnitude and the same sign

(2) a greater magnitude  and the opposite sign

(3) the same magnitude and the same sign

(4) the same magnitude and the opposite sign

4 link protons are 1+ and electrons are 1-

2 Which atom has the largest atomic radius?

(1) potassium   (3) francium

(2) rubidium    (4) cesium

3 link Table S, look up atomic radius of each element

3 In the wave-mechanical model of the atom, an orbital is defined as

(1) a region of the most probable proton location

(2) a region of the most probable electron location

(3) a circular path traveled by a proton around the nucleus

(4) a circular path traveled by an electron around the nucleus

2 link electrons are located in the cloud, they travel in waves

 

4 When an excited electron in an atom moves to the ground state, the electron

(1) absorbs energy as it moves to a higher energy state

(2) absorbs energy as it moves to a lower energy state

(3) emits energy as it moves to a higher energy :state

(4) emits energy as it moves to a lower energy state

4 link excited electrons fall giving off energy

5 Which polyatomic ion is found in the compound represented by the formula NaHCO3?

(1) acetate                       (3) hydrogen sulfate

(2) hydrogen carbonate   (4) oxalate

2 link Table E 

HCO3- is hydrogen carbonate

 

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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