Examlex
Arrange the following elements in order of increasing first ionization energy: 9F, 12Mg, 15P, 17Cl.
REM Sleep
A phase of sleep characterized by rapid eye movements, dreaming, and increased brain activity.
Deep Sleep
A stage of sleep characterized by slow brain waves, known as delta waves, associated with physical renewal and repair.
Rhythmic Sleep Pattern
The cyclical patterns of sleep phases, including non-REM and REM sleep, that occur throughout a sleep period.
Conifers
A group of cone-bearing seed plants, predominantly evergreens, that includes pines, spruces, and firs, among others.
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