Isomerism is the phenomenon whereby certain compounds, with the same molecular formula, exist in different forms owing to their different organisations of atoms. The concept of isomerism illustrates the fundamental importance of molecular structure and shape in organic chemistry.
By signing the nuclear deal, Iran has given up that nuclear umbrella for as long as two decades and made the case for the United States to further strengthen the conventional military capacities of Israel and the GCC.
According to Western powers, the deal ensures that Iran cannot produce the materials necessary to build a nuclear weapon without the world having one year's notice. That, among non-proliferation experts, is colloquially referred to as breakout time.. But that standard sunsets in ten years.