객관식
What is the main difference between a scientific law and a theory?
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2. Atoms & Elements
Atomic Theory
객관식
In the plum pudding model of the atom, which statement best describes the distribution of electrons?
A
Electrons are concentrated in a small, dense nucleus at the center of the atom.
B
Electrons are embedded within a positively charged 'pudding' that makes up most of the atom's volume.
C
Electrons are located in discrete energy levels outside a central nucleus.
D
Electrons orbit the nucleus in fixed paths, similar to planets around the sun.
검증된 단계별 안내1
Understand the historical context: The plum pudding model was an early atomic model proposed by J.J. Thomson before the discovery of the nucleus.
Recall the key idea of the plum pudding model: It suggested that the atom is composed of a positively charged 'pudding' or sphere, with negatively charged electrons embedded within it.
Contrast this with later models: Unlike the plum pudding model, later models (like Rutherford's and Bohr's) introduced a small, dense nucleus and electrons in discrete orbits or energy levels.
Identify the correct description: In the plum pudding model, electrons are not orbiting or concentrated in a nucleus but are spread throughout the positively charged volume.
Summarize the distribution: Therefore, the electrons are embedded within a positively charged 'pudding' that occupies most of the atom's volume.
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