molecular weight
Substance's atomic sum
Molecular weight is the mass of a molecule, calculated by adding up the atomic weights of all its atoms.
Water has a molecular weight of about 18—two hydrogens at 1 each, plus oxygen at 16.
The term is used interchangeably with molecular mass, though technically weight implies a force while mass does not.
Molecular weight determines many physical properties: substances with higher molecular weights generally have higher boiling points.
Grams per mole measurement
- atomic mass unitUnit for particle weight
- stoichiometryQuantitative chemical reaction analysis
- molesBurrowing insectivore mammals
- isotopeElemental variant by mass
mass spectrometry · polymer · monomer · biochemistry · analytical chemistry · covalent bond · periodic table · organic chemistry
Element's smallest unit
- protonPositive nuclear particle
- neutronUncharged nuclear particle
- electronNegative subatomic particle
- elementBasic substance or factor
hydrogen · carbon · oxygen · nitrogen · sulfur · phosphorus · valence · nucleus
Steadiness or amount owed
- precisionAccuracy of measurement
- quantificationExpressing something numerically
- calibrationAdjusting for measurement accuracy
- microgramMillionth of a gram
milligram · gram · weighing · tare · instrumentation · light scattering · sedimentation
molar mass
Grams per mole measurement
- atomic mass unitUnit for particle weight
- stoichiometryQuantitative chemical reaction analysis
- molesBurrowing insectivore mammals
isotope · mass spectrometry · polymer · monomer · biochemistry · analytical chemistry · covalent bond · periodic table · organic chemistry · inorganic chemistry
atom
Element's smallest unit
element · hydrogen · carbon · oxygen · nitrogen · sulfur · phosphorus · valence · nucleus · atomic number
balance
Steadiness or amount owed
- precisionAccuracy of measurement
- quantificationExpressing something numerically
- calibrationAdjusting for measurement accuracy
microgram · milligram · gram · weighing · tare · instrumentation · light scattering · sedimentation
- weightpound, pounds, kilogram, kilograms, gram
- Atomic Massatomic mass, atomic mass unit, molar mass, mass number, weighted average
- Drug Propertiesbioavailability, half-life, potency, efficacy, toxicity
- Molecular Propertiessolubility, polarity, hydrophobicity, melting point, boiling point
- polymerspolymer, elastomers, monomer, polyurethane foam, silicone rubber
- drug discoverycompounds, SAR, scaffolds, inhibitors, agonists
weight, molecule, molecular, molecules, biomolecule, macromolecule, biomolecules, intramolecular, intermolecular