(1) Argon is a monatomic gas.

(2) They established their monatomic and unreactive nature.

(3) Helium and argon are monatomic gases.

(4) Helium is a monatomic chemically inert gas.

(5) The lattice vibrations of one - dimensional coupled monatomic chain and the dispersion relations are studied.

(6) So the discovery of the unreactive monatomic gas argon by Lord Rayleigh and William Ramsay in 1895 came as a total surprise.

(7) It is monatomic and extremely inert, forming no known chemical compounds.

(8) The equation of lattice vibration of one-dimensional monatomic lattice and the equation of longitudinal vibration of a uniform bar are discussed.

(9) Recoilless fractions of simple cubic monatomic nanocrystalline particles are calculated by using displacement displacement Green's function.

(10) We get the lattice wave solution of monatomic chain under the free boundary condition.

(11) The picture of the lattice vibration mode for one-dimensional monatomic chain induced by an interstitial impurity is studied mainly.

(12) We prove that the answer of stationary wave under cyclic boundary condition that has double length of the monatomic chain is the same as the answer under reflecting boundary condition.