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# 26.13: M

Difficulty Level: At Grade Created by: CK-12
macroscopic properties
properties that describe the system as a whole and can be observed and measured without determining the properties of individual molecules
magnetic quantum number
a number that describes the orientation in space of a particular orbital
malleable
property of being able to be hammered or rolled into sheets
manometer
a liquid column pressure-measuring device
mass
a measure of the amount of matter in an object
mass defect
the difference between the sum of the masses of the nuclear components and the mass of the corresponding nucleus
mass number
the total number of protons and neutrons in the nucleus of an atom
mass percent
the number of grams of the solute in the number of grams of solution
matter
anything that has mass and volume
melting
the phase change from solid to liquid
melting point
the temperature at which a substance changes from the solid phase to the liquid phase
metallic bond
the attractive force that binds metal atoms together
metallic conduction
movement of electrons through a piece of metal
meter
the SI unit of length
metric system
an international decimal-based system of measurement
miscible
liquids that have the ability to dissolve in each other
model
a descriptive, graphic, or three-dimensional representation of a hypothesis or theory used to help enhance understanding
moderator
a medium that reduces the velocity of fast neutrons
molality
the number of moles of solute per kilograms of solvent
molar mass
the mass in grams of one mole of a substance
molar volume
the volume occupied by one mole of a substance in the form of a solid, liquid, or gas
molarity
the number of moles of solute per liter of solution
mole
an Avogadro’s number of objects; 1.00 mole of carbon-12 atoms has a mass of 12.0 grams and contains $6.02 \times 10^23$ atoms
mole ratio
a quantitative relationship between two components of a chemical reaction, determined by the coefficients in the balanced equation
molecular formula
a formula indicating the actual number of each kind of atom contained in a molecule
molecular geometry
the specific three-dimensional arrangement of atoms in a molecule
molecular mass
the mass of a molecule found by adding the atomic masses of the atoms comprising the molecule
molecule
the smallest particle of a compound
multi-step reaction
a reaction that occurs in more than one step

Feb 23, 2012

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Mar 26, 2015
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CK.SCI.ENG.SE.2.Chemistry-Glossary.26.13