August 2010 Chemistry Regents #59-60

Highlight to reveal answers and explanations

 

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-53 Questions 54-56 Questions 57-58 Questions 59-60 Questions 61-63 Questions 64-66 Questions 67-69 Questions 70-72 Questions 73-74 Questions 75-78 Questions 79-81

 

Other Regents Exams

Questions

 

Base your answers to questions 59 and 60 on the information below.

In the gold foil experiment, a thin sheet of gold was bombarded with alpha particles. Almost all the alpha particles passed straight through the foil. Only a few alpha particles were deflected from their original paths.

59 State one conclusion about atomic structure based on the observation that almost all alpha particles passed straight through the foil. [1]

Highlight box for Answer  

Atoms are mostly empty space.

60 Explain, in terms of charged particles, why some of the alpha particles were deflected. [1]

Highlight box for Answer  

Alpha particles are positive and are repelled by the nucleus that is also positive.

Both protons and alpha particles are positively charged so they repel each other.

Protons and alpha particles have the same charge.

on to the next questions

Questions 1-10 Questions 11-20 Questions 21-30 Questions 31-40 Questions 41-50

Questions 51-53 Questions 54-56 Questions 57-58 Questions 59-60 Questions 61-63 Questions 64-66 Questions 67-69 Questions 70-72 Questions 73-74 Questions 75-78 Questions 79-81

 

Back to Regents Exams