Section 4.3 modern atomic theory pages 113-118 answer key – Embark on a captivating journey through the realm of modern atomic theory, as Artikeld in Section 4.3. This comprehensive guide, encompassing pages 113-118, unlocks the fundamental principles that govern the structure of atoms, the arrangement of electrons, and the evolution of our understanding of matter.
Prepare to delve into the groundbreaking contributions of scientific luminaries such as J.J. Thomson, Ernest Rutherford, and Niels Bohr, whose pioneering experiments laid the foundation for our current understanding of the atomic realm.
Section 4.3: Modern Atomic Theory: Section 4.3 Modern Atomic Theory Pages 113-118 Answer Key
Modern atomic theory describes the structure of atoms and the arrangement of electrons within them. It emerged through the contributions of scientists such as J.J. Thomson, Ernest Rutherford, and Niels Bohr.
Key Concepts of Modern Atomic Theory, Section 4.3 modern atomic theory pages 113-118 answer key
- Atoms are composed of a nucleus and electrons.
- The nucleus contains protons and neutrons.
- Electrons are arranged in shells around the nucleus.
Differences between Dalton’s and Modern Atomic Theory
| Characteristic | Dalton’s Atomic Theory | Modern Atomic Theory |
|---|---|---|
| Composition of atom | Indivisible, uniform spheres | Contains nucleus and electrons |
| Structure of atom | Solid, indivisible spheres | Contains subatomic particles |
| Electrons | Not considered | Arranged in shells around the nucleus |
FAQ Section
What are the key differences between Dalton’s atomic theory and modern atomic theory?
Modern atomic theory expands upon Dalton’s theory by incorporating the concepts of subatomic particles, electron configuration, and the nuclear model of the atom.
How is electron configuration determined?
Electron configuration is determined by theaufbau principle, which states that electrons fill orbitals in order of increasing energy.
What are the causes of periodic trends in atomic radius, ionization energy, and electronegativity?
These trends are caused by changes in effective nuclear charge and shielding effects as you move across and down the periodic table.
