NH radicals and H atoms were identified as products in the reaction of N(D-2) with CH4. The absolute yields of NH and H were determined to be 0.3+/-0.1 and 0.8+/-0.2, respectively. The rotational state distributions of NH (upsilon"=0) for CH4 and partially deuterated methanes, CHnD4-n (n = 1-3), are single modal and peak at N"=13+/-2, while the vibrational population ratios, NH (upsilon"=1)/NH (upsilon"=0), are 0.6. The rotational energy distribution of ND (upsilon"=0) from CD, is similar to that for NH (upsilon"=0). The ND (upsilon"=1)/ND (upsilon"=0) ratio is 0.6. Doppler profiles of H and D atoms were measured to evaluate the energy released to the translational mode. it was between 72 and 85 kJ mol(-1), suggesting the following H atom product-ion mechanism : N(D-2)+CH4-->H+CH2NH. The H+CH3N channel is minor. In the reactions with partially deuterated methanes, the isotopic ratios, [H]/[D] and [NH]/[ND], are larger than the stoichiometric ratios in the reactant methanes. These results suggest that C-H bonds are more reactive to N(D-2) than C-D bonds, while H atoms are ejected more preferentially than D atoms.