How many naturally occurring elements are there

NGSS Performance Expectations: HS-PS Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms. The content and activity in this topic will work towards building an understanding of the periodic table and how elements are organized. Develop a system of organization for common elements by physical properties.

Further Investigations. Activity: Organizing the Elements. Special Features:. Representative Image:. Further Investigations: What is an Invertebrate?

Question Set: What is a Mammal? The table below lists the longest-lived isotopes of the transuranium elements, with their half-lives, discoverers, and method of production. Method of Production Logest-lived Isotope. Seaborg bombardment of Cf with O 2. Oxford, Clarendon Press, ; and David L. Heiserman, Exploring Chemical Elements and their Compounds. Key: naturally-occurring synthetic. Atomic Number. Named For Keep in mind that even if we avoid such errors Bismuth does not have stable isotopes.

It has one radioisotope with an extremely long half-life. Thank you for that information and the link. The abstract tells me that the half-life of Bi is 1. If we estimate the current age of the universe as being 14 billion years old i.

I am astounded that such measurements are possible and grateful to you for letting me know. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email.