Learning about the elements and chemical compounds is a breeze with our collection of chemistry activities and pages.
KELVIN TEMPERATURE SCALE
Hydrogen (H) Elements.
Periodic Table of the Elements.
Proton. Protons are small, positively-charged atomic particles
Atomic Weight. An atom's atomic weight measures the total of the mass of the protons, neutrons, and electrons.
Nucleus. The nucleus of an atom is its tiny central region, and comprises the bulk of the atom's mass, containing the...
STP means standard temperature and pressure.
Test your knowledge of the periodic table by matching the elements to their symbols in these flashcards.
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Atomic Number. An atom's atomic number of an element is the number of protons in the nucleus of one of its atoms
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