Ions and Atoms Worksheet
Explore the fundamental building blocks of matter with this Grade 7 Science worksheet covering atoms, ions, and their components.
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Ions and Atoms: The Building Blocks of Matter
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Read each question carefully and answer to the best of your ability. This worksheet will test your knowledge of atoms, their components, and how ions are formed.
1. Which subatomic particle has a negative charge?
Proton
Neutron
Electron
Nucleus
2. An atom that has gained or lost electrons is called an:
Molecule
Isotope
Ion
Compound
3. The center of an atom is called the .
4. Atoms with a positive charge are called .
5. The atomic number of an element is determined by the number of in its nucleus.
6. All atoms of the same element have the same number of protons.
True
False
7. Neutrons have a positive charge.
True
False
8. Briefly explain the difference between an atom and an ion.
9. Describe the three main subatomic particles and their charges.
10. Label the parts of the atom shown in the diagram below:
A:
B:
C: