NY Regents Chemistry Exam August 2023 Question 31
31 Diagram 1 represents an atom of hydrogen, showing the nucleus and the electron in the first shell. What is represented by diagram 2?
(1) a positive ion of hydrogen
(2) a negative ion of hydrogen
(3) an atom of hydrogen in an excited state
(4) an atom of hydrogen in the ground state
Solution: Looking at the diagram 1 and diagram 2, we can see that the electron moved from the shell next to the nucleus to the outer shell. When an electron goes from a ground energy level to a higher energy level, it is called an excited state. Choice 3
Choice 3
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