Science map
Atomic structure & quantum ideas
These pages connect ideas that are often learned separately. Follow the links in any order: the goal is to see how atomic structure, measurable properties and physical laws explain one another.
Explore the connections
Sources
· Mendeleev.com · periodic table · chemistry · physics
Before going further
Try this
Connect the idea on this page with one concrete situation. Name the quantity, particle or phenomenon involved, then ask what would change if one variable increased while the others stayed fixed.Use a simple value first. Predict the direction of the result before calculating, then check units and order of magnitude. If the number is surprising, investigate the model before trusting the calculator.
The key idea
At the scale of an atom, almost all the mass is concentrated in a tiny nucleus. Electrons occupy quantum states around it rather than little planetary tracks. The atomic number counts protons and identifies the element.
Why it matters
Think of the periodic table as a map whose address is the proton count.
118 elements. One clear map of matter. Explore the periodic table, open any element, or jump straight into scientific converters.
These pages connect ideas that are often learned separately. Follow the links in any order: the goal is to see how atomic structure, measurable properties and physical laws explain one another.
At the scale of an atom, almost all the mass is concentrated in a tiny nucleus. Electrons occupy quantum states around it rather than little planetary tracks. The atomic number counts protons and identifies the element.