Gezhagn, Tewodros2018-07-062023-11-092018-07-062023-11-092012-03http://10.90.10.223:4000/handle/123456789/6977This study deals with the elemental analysis of rock sample which are collected from North Wollo (Woldia). Neutron Activation Analysis (NAA) is a sensitive analytical technique useful for performing both qualitative and quantitative multi-elemental analysis of major, minor and trace elements in samples from almost every conceivable field of scientific on technical interest. Am-Be Neutron source was used. The mass of sodium found in 2.103 gm. of irradiated sample is 0.034861216 gm.; which means 1.65 % of the irradiated sample is sodiumenNatural Rock Sample usingThesis