Where more than one isotope exists, the value given is the abundance weighted average.Ītoms of the same element with different numbers of neutrons. This is approximately the sum of the number of protons and neutrons in the nucleus. The mass of an atom relative to that of carbon-12. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase.ĭensity is the mass of a substance that would fill 1 cm 3 at room temperature. The temperature at which the liquid–gas phase change occurs. The temperature at which the solid–liquid phase change occurs. The arrangements of electrons above the last (closed shell) noble gas. These blocks are named for the characteristic spectra they produce: sharp (s), principal (p), diffuse (d), and fundamental (f). The atomic number of each element increases by one, reading from left to right.Įlements are organised into blocks by the orbital type in which the outer electrons are found. Members of a group typically have similar properties and electron configurations in their outer shell.Ī horizontal row in the periodic table. Officials say tigers will be fitted with radio collars with a satellite tracking facility and there will be a team of around 12 forest officers as well as wildlife researchers constantly monitoring the animals.A vertical column in the periodic table. The stock will come from neighboring Ranthambore National Park, which has a similar habitat to Sariska. If the population adapts and breeds, two batches of two to three tigers will be brought in every three years as experts say restocking is essential to maintain genetic and demographic viability of the population. The remaining three will then be introduced over the next two years. The first tigress could be brought into the reserve by the end of the year, officials say, and will be monitored for a month before a male is introduced. “The habitat is beautiful, the prey of the tigers has increased and the biodiversity is enriched.”įollowing International Union for the Conservation of Nature (IUCN) guidelines, five young adult tigers - three females and two males - will be introduced over a staggered period of three years. This semi-arid region of western India’s Aravalli Hill Range was once the tiger’s ideal habitat, where it could stalk its plentiful supply of prey - chital, sambar and wild pig - across Sariska’s 880 square km (340 square miles) of scrubland, forests and ravines.īut in early 2005, India was shocked by news that the entire tiger population in Sariska had been wiped out with poachers slaughtering at least 13 tigers over four years. “This has never been done anywhere in the world and it is a challenge, but we can do it,” Laxmi Narayan Dave, minister for environment in Rajasthan state where Sariska is located, told Reuters. Saying they have learnt from these mistakes, officials are now planning to bring the big cats back to the reserve in what conservationists say will be the world’s first ever attempt to reintroduce tigers to a habitat. The antelopes’ predator has disappeared from the reserve after its population was wiped out by poachers two years ago, a massive conservation scandal widely blamed on the negligence of the park and state government authorities. Officials are now planning to bring Tigers back to the Sariska Tiger reserve in what conservationists say will be the world's first ever attempt to reintroduce tigers to a habitat. An Indian Royal Bengal tiger is seen in a file photo.
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