Inner Transition Metals - Science Struck
sciencestruck.com › inner-transition-metalsIt is based on these periods and groups that the 103 elements in nature are classified. In this article, we are going to read about two periods in the periodic table which occupy 30 chemical elements and are called the inner transition metals. These are subcategorized by two individual series called the Lanthanoids and Actinoids and they occupy the last two individual periods of the table i.e. the ‘f’ block.