國中教甄｜理化理化109 年第 52 題單選題

What information about the structure of a hydrogen atom can be gained from its emission spectrum?

AThe electron in the hydrogen atom is held near the nucleus.

BThe electron may exist in any of several energy levels.正確答案

CMost of the mass of the atom is in its nucleus.

DA hydrogen atom contains one proton and one electron.

答案與詳解

正確答案

氫原子的線狀發射光譜證實了電子只能存在於特定且不連續的量子化能階中。

AThe electron in the hydrogen atom is held near the nucleus.✕ 錯誤

電子受原子核吸引而束縛在附近是庫侖靜電力的作用，並非由發射光譜直接證實的結構資訊。

BThe electron may exist in any of several energy levels.✓ 正確

氫原子發射光譜為不連續的線狀光譜，代表電子在不同能階間躍遷時會釋放特定能量的光子，直接證實電子存在於數個特定的量子化能階中。

CMost of the mass of the atom is in its nucleus.✕ 錯誤

DA hydrogen atom contains one proton and one electron.✕ 錯誤

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