• However, light absorption and fast electron transfer are two main challenges that restrict the practical application of photocatalysis. (researchgate.net)
  • Isotopes were not given separate places in the periodic table although Mendeleev's classification is based on the atomic masses. (topperlearning.com)
  • The atomic nature of the hydrogen isotopes is illustrated in Figure 3.1. (gw-project.org)
  • 2 H 2 16 O, 1 H 2 18 O, 3 H 2 17 O are some examples of the molecules that comprise water, which in its most common form is 1 H 2 16 O. Of the six isotopes of hydrogen and oxygen in Table 3.1, five are stable and one, 3 H, known as tritium, is radioactive, with a half-life of 12.3 years. (gw-project.org)
  • For practical reasons, we will limit the abundance of these finds, which Dr Peter Plichta was allowed to bring to light , to a handful of excellent examples, e.g. the chemical periodic system. (submission.org)
  • 1984. The importance of trophic transfer in the bioaccumulation of chemical contaminants in aquatic ecosystems. (cdc.gov)
  • Chemical processes in the groundwater zone can influence the strength of geologic materials, and in situations where they are not recognized, can cause failure of artificial slopes, dams, mining excavations, and other features of importance to man. (gw-project.org)
  • All chemical elements have two or more isotopes. (gw-project.org)