Atomic Structure Worksheet
A Grade 9 science worksheet covering fundamental concepts of atomic structure, including subatomic particles, atomic number, mass number, and isotopes.
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Standards
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Atomic Structure Worksheet
Name:
Date:
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which subatomic particle has a positive charge?
Electron
Neutron
Proton
Photon
2. The atomic number of an element is determined by the number of:
Neutrons
Electrons
Protons
Both protons and neutrons
3. The is the central part of an atom, containing protons and neutrons.
4. Atoms of the same element with different numbers of neutrons are called .
5. An electron has a charge.
6. Describe the main differences between protons, neutrons, and electrons in terms of their charge and location within an atom.
7. Explain what an isotope is, and provide an example.
8. The mass number of an atom is the sum of its protons and electrons.
True
False
9. All atoms of a given element have the same number of protons.
True
False
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