IB Chemistry Sub-topic S1.2 Definitions
This page contains our IB Chemistry definitions for sub-topic S1.2. By learning each one of these definitions, you will fully cover the content for IB Chemistry 'The atom'.
chemical reaction
A reaction that forms new substance(s) by breaking bonds in the reactants and forming bonds in the products, causing an energy change in the system but preserving mass and particles
element
Simplest substance made from atoms that cannot be broken down
Ions
These are nuclides that have lost or gained electrons, gaining a positive or negative charge
Isotopes
These are nuclides with different numbers of neutrons, and thus different mass numbers
Nucleon
It is a particle in the nucleus
orbital
A region of space where there is a high probability of finding an electron
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