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Grade 7
Matter
4. Elements
4.1 Atomic Structure, Protons, neutrons, electrons
Atomic Structure: Protons, Neutrons, and Electrons
Explore the building blocks of matter by learning how protons, neutrons, and electrons work together to define every element in the universe.
What You'll Learn
Protons define atomic number and uniquely identify every chemical element.
Mass number equals the total of protons and neutrons combined together.
Isotopes share the same proton count but differ in neutron numbers.
Electrons orbit the nucleus in shells and determine an atom's charge.
What You'll Practice
1
Students identify elements using proton count and atomic number values.
2
Learners calculate neutron count by subtracting atomic number from mass.
3
Practice questions distinguish isotopes, ions, and neutral atom properties.
Why This Matters
Understanding atomic structure is the essential foundation for all of chemistry and physics, enabling students to explain how every substance in the world is built and how elements interact.
This Unit Includes
1 Video lesson
Practice exercises
Learning resources
Skills
Atomic Structure
Subatomic Particles
Atomic Number
Mass Number
Isotopes
BC Curriculum Aligned