Avogadro's number
Particles per mole
Avogadro's number is approximately 6.022 × 10²³, representing the number of particles (atoms, molecules, or other entities) in one mole of a substance.
This constant links the atomic scale to measurable quantities, allowing chemists to count particles by weighing them: One mole of water contains Avogadro's number of molecules.
Named for the Italian scientist Amedeo Avogadro.
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- atomsSmallest elemental units
- moleculesBonded atomic groups
- particlesMinute pieces of matter
- substancePhysical material with mass
amount · formula · molar mass · molecular weight · concentration · molarity · solution · compound
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- fundamentalForming the base
- SIUniversal measurement framework
- definitionStatement of meaning
- exactPerfectly correct, no deviation
invariable · universal · dimensional · unit conversion · scientific notation · magnitude
Smallest elemental units
- protonsPositive nuclear particles
- neutronsUncharged subatomic particles
- electronsNegative charges in atoms
- nucleusCentral controlling part
atomic mass · isotope · atomic number · subatomic · atomic weight · ion · valence · electron cloud
Substances entering a reaction
- productsItems made for sale
- balanced equationFormula with conserved atoms
- coefficientsNumerical multipliers in expressions
- excessSurplus beyond need
yield · proportionality · titration · empirical formula · molecular formula · grams · molarity · equivalence
Equation linking gas properties
- STPDefined laboratory conditions
- kinetic theoryHeat as atomic motion
- PV=nRTEquation for ideal gases
- pressureForce upon contact
temperature · Boyle · Charles · Gay-Lussac · Dalton · partial pressure · diffusion · effusion
mole
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substance · amount · formula · molar mass · molecular weight · concentration · molarity · solution · compound · element
mole
Subterranean insectivore
- fundamentalForming the base
- SIUniversal measurement framework
- definitionStatement of meaning
exact · invariable · universal · dimensional · unit conversion · scientific notation · magnitude
atoms
Smallest elemental units
- protonsPositive nuclear particles
- neutronsUncharged subatomic particles
- electronsNegative charges in atoms
nucleus · atomic mass · isotope · atomic number · subatomic · atomic weight · ion · valence · electron cloud · mass number
reactants
Substances entering a reaction
- productsItems made for sale
- balanced equationFormula with conserved atoms
- coefficientsNumerical multipliers in expressions
excess · yield · proportionality · titration · empirical formula · molecular formula · grams · molarity · equivalence
ideal gas law
Equation linking gas properties
- STPDefined laboratory conditions
- kinetic theoryHeat as atomic motion
- PV=nRTEquation for ideal gases
pressure · temperature · Boyle · Charles · Gay-Lussac · Dalton · partial pressure · diffusion · effusion
Avogadro's numberone
Lowest positive integer
zero · infinitesimal · unity · a handful · single digit