The half-life of cesium-137 is 30.2 years. If the initial mass of cesium-137 is 500 g, how much in grams will remain after 151 years??

It dont even matter because at the end of thre day we gone life like it ius s

As cooking food that has to go in the oven

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.