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Europium (Eu) - Properties

Atomic mass, symbol and atomic number Europium is a natural element with the element symbol Eu and atomic number 63. In the periodic table it belongs to the Lanthanoids with an atomic mass of 151.964 u. The chemical element discovered by Eugène Demarçay in 1896 is not radioactive and is in a solid state at room temperature.
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The praying mantis - profile

Character Name: Praying Mantis Other Names: European Mantis Latin Name: Mantis religiosa Class: Insects Size: 7.5cm (female), 5.5cm (male) Weight: about 8g Age: 7 - 12 months Appearance: green Gender Dimorphism: Yes Diet type : Insectivore (insektivor) Food: Bees, flies, grasshoppers, spiders, wasps Origin: Africa Sleep-wake cycle: diurnal Habitat: forest, meadow Natural enemies: ants, wasps, birds Sexual maturity :?
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The lion - Wanted poster

Character Name: Lion Latin Name: Panthera leo Class: Mammals Size: 1,5 - 2,3m Weight: 100 - 240kg Age: 10 - 15 years Appearance: yellowish, sandy Sexual Diminor: Yes Type of Diet: Carnivore Food: Antelope, Buffalo, gnu, hare, zebra Origin: Africa native origin: Africa sleep-wake-rhythm: dusk-active habitat: steppe natural enemies: / sexual maturity: with 2 - 3 years mating season: throughout the year gestation period: 105 - 110 days litter size: 2 - 4 kitties Social Behavior: Pack Animal Endangered: Yes You can find further profiles of animals in the Encyclopaedia of Animals.
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Terbium (Tb) properties

Atomic mass, symbol and atomic number Terbium is a natural element with the element symbol Tb and atomic number 65. In the periodic table it belongs to the Lanthanoids with an atomic mass of 158.925 u. The chemical element discovered by Carl Gustav Mosander in 1842 is not radioactive and is in a solid state of aggregation at room temperature.
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Hydropower

Hydropower? Definition and explanation: Hydropower or hydro-energy is one of the renewable energy sources that allows the indirect use of solar energy to generate electricity. This is done using large power plants that convert the flow or movement of water (kinetic energy of water) into electrical energy.
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Nitrogen (N) properties

Atomic mass, symbol and atomic number Nitrogen is a naturally occurring element with the element symbol N and the atomic number 7. In the periodic table it stands with an atomic mass of 14.006 u in the 5th main group. The chemical element discovered by Daniel Rutherford in 1772 is not radioactive and is in a gaseous state at room temperature.
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