Ions and Atoms Worksheet
Explore the fundamental concepts of atoms, ions, and their components with this Grade 9 science worksheet.
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Topics
Ions and Atoms
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Date:
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Read each question carefully and answer to the best of your ability. Refer to your notes and textbook if needed.
1. Which subatomic particle has a negative charge?
Proton
Neutron
Electron
Nucleus
2. An atom that has gained or lost electrons is called a(n):
Isotope
Molecule
Ion
Compound
3. The atomic number of an element is determined by the number of in its nucleus.
4. A positively charged ion is called a , while a negatively charged ion is called an .
5. Explain the difference between an atom and an ion.
6. All atoms of the same element have the same number of neutrons.
True
False
7. The mass number of an atom is the sum of its protons and electrons.
True
False
8. Observe the Bohr model of an atom below. Identify the subatomic particles labeled A, B, and C.
A:
B:
C: