Puedes calcular la masa atómica de cualquier elemento si conoces el número de isotopos que se encuentran en la naturaleza, sus masas y su porciento de abundancia?

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas