What this chapter is about
By the late 1800s, scientists recognized atoms as fundamental building blocks of matter. J.J. Thomson's discovery of the electron (1897) showed atoms contain negatively charged particles, yet atoms are electrically neutral. This raised fundamental questions: How are electrons arranged? Where is the positive charge? Early atomic models proposed different structures, culminating in Bohr's quantum model. This chapter explores atomic structure, electron behavior, and atomic models.
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Learning objectives
- 1Explain atomic Structure, Electron Orbits, and Atomic Models
- 2Explain dISCOVERY OF THE ELECTRON
- 3Explain thomson's Cathode Ray Experiments
- 4Explain aTOMIC MODELS
- 5Explain thomson's Plum Pudding Model (1898)
- 6Explain rutherford's Nuclear Model (1911)
Your learning path
Key terms
MechanismConclusionsLimitationsNuclear sizeApplicationsQuantum numbersHydrogen spectrumIonization energyExcitation energyModelLaserGroupsResultsPeriodselectronsStatement
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