any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter
noun
a lamp consisting of a small gas-discharge tube containing neon at low pressure; luminescence is produced by the action of currents at high frequencies that are wrapped a few turns around the tube
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Dive into this elemental vocabulary list, where the building blocks of the universe come alive in a symphony of atoms and molecules, revealing the essence of nature's boundless complexity.