Examlex
The kingdoms included in the Linnaeus system of classification are
Oxygen
A chemical element with symbol O and atomic number 8, essential for life as part of the process of respiration.
Electrons
Subatomic particles with a negative charge, orbiting the nucleus of an atom and involved in chemical bonds and electrical conductivity.
Oxidized
A chemical process where a substance loses electrons, often associated with the gain of oxygen or the loss of hydrogen.
Non-metal Free Elements
Elements that exist in their natural state not combined with other elements and do not display metallic characteristics; examples include oxygen (O2) and nitrogen (N2).
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