Atom — smallest element unit?
Contains protons, neutrons, electrons.
Periodic Table — organized by?
Increasing proton number.
Outer Electron States — role?
Determine an atom’s reactivity.
Proton Number — also?
Atomic number, defines element.
Electron Configuration — pattern?
Repeats periodically across elements.
Nuclear Fusion — process?
Light nuclei combine, releasing energy.
Nuclear Fission — process?
Heavy nucleus splits, releasing energy.
Radioactive Decay — mechanism?
Unstable nucleus transforms spontaneously.
Nuclear Energy — origin?
From changes in nuclear binding energy.
Conservation of Nucleons — principle?
Protons + neutrons stay constant.
Star Lifecycle — stages?
Formation, main sequence, death.
Sun’s lifespan — years?
About 10 billion years.
Element formation in stars — process?
Fusion creates lighter elements.
Supernova — creates?
Heavier elements beyond iron.
Star energy — source?
Nuclear fusion in core.
Water’s thermal capacity — property?
Absorbs/releases large energy amounts.
Water expands — when?
When it freezes into ice.
Water — solvent?
Dissolves many substances.
Water’s effect — on Earth?
Shapes surface, influences climate.
Energy resources — consideration?
Cost, safety, environment, sustainability.
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1. What is the primary cause that leads to the formation of new elements within stars and influences their lifecycle?
2. According to the source, what does nuclear fusion involve?
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