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  2. Heavy metals - Wikipedia

    en.wikipedia.org/wiki/Heavy_metal_element

    Recent examples of heavy metal contamination and health risks include the occurrence of Minamata disease, in Japan (1932–1968; lawsuits ongoing as of 2016); [86] the Bento Rodrigues dam disaster in Brazil, [87] high levels of lead in drinking water supplied to the residents of Flint, Michigan, in the north-east of the United States [88] and ...

  3. Water-reactive substances - Wikipedia

    en.wikipedia.org/wiki/Water-reactive_substances

    The alkaline earth metals (Be, Mg, Ca, Sr, Ba, and Ra) are the second most reactive metals in the periodic table, and, like the Group 1 metals, have increasing reactivity with increasing numbers of energy levels. Beryllium (Be) is the only alkaline earth metal that does not react with water or steam, even if the metal is heated red hot. [9]

  4. Toxic heavy metal - Wikipedia

    en.wikipedia.org/wiki/Toxic_heavy_metal

    A toxic heavy metal is a common but misleading term for a metal-like element noted for its potential toxicity. [4] Not all heavy metals are toxic and some toxic metals are not heavy. [ 5 ] Elements often discussed as toxic include cadmium , mercury and lead , [ 6 ] all of which appear in the World Health Organization 's list of 10 chemicals of ...

  5. List of hyperaccumulators - Wikipedia

    en.wikipedia.org/wiki/List_of_hyperaccumulators

    Its rhizosphere is denser in bacteria than that of Thlaspi caerulescens, but T. caerulescens has relatively more metal-resistant bacteria. [ 31 ] Cs-137 activity was much smaller in leaves of larch and sycamore maple than of spruce : spruce > larch > sycamore maple.

  6. Metal toxicity - Wikipedia

    en.wikipedia.org/wiki/Metal_toxicity

    Metal toxicity or metal poisoning is the toxic effect of certain metals in certain forms and doses on life. Some metals are toxic when they form poisonous soluble compounds. Certain metals have no biological role, i.e. are not essential minerals, or are toxic when in a certain form. [ 1 ]

  7. List of aqueous ions by element - Wikipedia

    en.wikipedia.org/wiki/List_of_aqueous_ions_by...

    Some hydroxides of non-metallic elements are soluble in water; they are not included in the following table. Examples cited by Baes and Mesmer (p. 413) include hydroxides of Gallium(III), Indium(III), Thallium(III), Arsenic(III), Antimony(III) and Bismuth(III). Most hydroxides of transition metals are classified as being "insoluble" in water.

  8. Rare-earth element - Wikipedia

    en.wikipedia.org/wiki/Rare-earth_element

    Increasing atomic numbers between light and heavy rare-earth elements and decreasing atomic radii throughout the series causes chemical variations. [28] Europium is exempt of this classification as it has two valence states: Eu 2+ and Eu 3+. [28] Yttrium is grouped as heavy rare-earth element due to chemical similarities. [29]

  9. Heavy water - Wikipedia

    en.wikipedia.org/wiki/Heavy_water

    Heavy water is 10.6% denser than ordinary water, and heavy water's physically different properties can be seen without equipment if a frozen sample is dropped into normal water, as it will sink. If the water is ice-cold the higher melting temperature of heavy ice can also be observed: it melts at 3.7 °C, and thus does not melt in ice-cold ...