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The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

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Phase Diagram

Diagram that shows equilibrium temperature-pressure relationships for different phases of a substance.

Energy

The capacity to do work or transfer heat.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.

Spectrum

Display of component wavelengths (colours) of electromagnetic radiation.

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Law of Conservation of Matter and Energy

The total amount of matter and energy available in the universe is fixed.

DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Weak Electrolyte

A substance that conducts electricity poorly in a dilute aqueous solution.

First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

S Orbital

A spherically symmetrical atomic orbital, one per energy level.