NEGATIVE ELECTRODE ACTIVE MATERIAL, MIXED NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, LITHIUM ION SECONDARY BATTERY, PRODUCTION METHOD OF NEGATIVE ELECTRODE ACTIVE MATERIAL, AND PRODUCTION METHOD OF LITHIUM ION SECONDARY BATTERY

A negative electrode active material comprising: particles of negative electrode active material, wherein the particles of negative electrode active material contain particles of silicon compound containing a silicon compound (SiO:0.5≤x≤1.6), and wherein the particles of silicon compound have, as chemical shift values obtained from a Si-MAS-NMR spectrum, an intensity A of a peak derived from amorphous silicon obtained in −40 to −60 ppm, an intensity B of a peak derived from silicon dioxide obtained in the vicinity of −110 ppm, and an intensity C of a peak derived from Si obtained in the vicinity of −83 ppm, which satisfy the following formula 1 and formula 2. (1) B