Grade 12 Atomic Structure Worksheet
A comprehensive worksheet for Grade 12 students covering fundamental concepts of atomic structure, including subatomic particles, isotopes, and electron configuration.
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Grade 12 Atomic Structure Worksheet
Name:
Date:
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Read each question carefully and answer to the best of your knowledge. Show all your work for calculations.
1. Which subatomic particle contributes significantly to the mass of an atom but has no charge?
Electron
Proton
Neutron
Photon
2. An element has an atomic number of 17 and a mass number of 35. How many neutrons does it have?
17
18
35
52
3. Isotopes are atoms of the same element that have the same number of protons but different numbers of .
4. The quantum mechanical model of the atom describes the probability of finding an electron in a certain region of space called an .
5. Explain the concept of electron shielding and how it affects the effective nuclear charge experienced by valence electrons.
6. All atoms of a given element have the same number of neutrons.
True
False
7. Describe the key differences between the Bohr model of the atom and the quantum mechanical model. Discuss the limitations of the Bohr model that led to the development of the more advanced quantum mechanical model.