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Task B. Atomic Model Spotlight: Illuminating the Secrets of the Atom 1. Examine the word search puzzle you completed to identify the names of five scientific models that explain the structure of the atom. 2. Fill in the first column of the table with the names of these atomic models. Each model name should correspond to one row in the table. 3. For each model, research and complete the remaining columns of the table: 4. Proponent and Year Write down the name of the scientist or scientists who proposed the model, along with the year it was proposed 5. Main Features: Summarize the key characteristics or features of the atomic model. 6. Contribution to the Understanding of Atomic Structure: Describe how the model contributed to our understanding of the structure of the atom. 7. Be thorough and accurate in your research, and ensure that each column of the table is completed with relevant information . 8. Once you have filled in all the details for each atomic model, review your work to ensure clarity and correctness. Model (Answer Proponent/ taken from the word search) Main features Contribution to understanding of Year introduced atomic structure​

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Atomic Models and Their Contributions

1. Dalton's Atomic Model

  • Proponent/Year- John Dalton, 1803-1808.
  • Main Features- Matter consists of indivisible atoms; all atoms of an element are identical; compounds form from different atoms in fixed ratios.
  • Contribution- Established the concept of atoms as fundamental units of matter, forming the basis for modern chemistry and laws of conservation of mass and definite proportions.

2. Thomson's Plum Pudding Model

  • Proponent/Year- J.J. Thomson, 1904.
  • Main Features- Atoms are composed of negatively charged electrons within a positively charged "soup."
  • Contribution- Introduced the idea of subatomic particles, indicating that atoms are not indivisible and setting the stage for further atomic exploration.

3. Rutherford's Planetary Model

  • Proponent/Year- Ernest Rutherford, 1911.
  • Main Features- Atoms have a small, dense nucleus with electrons orbiting around it.
  • Contribution- Demonstrated that most of an atom's mass is in the nucleus, leading to the discovery of the atomic nucleus.

4. Bohr's Atomic Model

  • Proponent/Year- Niels Bohr, 1913.
  • Main Features- Electrons occupy quantized orbits around the nucleus and can move between these orbits by absorbing or emitting energy.
  • Contribution- Clarified electron arrangements and energy levels, crucial for understanding atomic spectra and chemical behavior.

5. Quantum Mechanical Model

  • Proponent/Year- Developed by various scientists, 1920s-1960s.
  • Main Features- Describes electrons as wave functions rather than particles, incorporating quantum mechanics principles.
  • Contribution- Provides the most accurate depiction of atomic structure, explaining electron behavior and interactions, enhancing our understanding of chemical bonding and reactions.

Answer

Explanation: main features