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ରାସାୟନିକ ମୌଳିକ କିମ୍ବା ଏହାର ସମସ୍ଥାନିକ ଗୁଡ଼ିକର କ୍ଷୁଦ୍ରତମ ଅଂଶକୁ ପରମାଣୁ କୁହାଯାଏ । ଭୂ-ପୃଷ୍ଠର ଅଧିକାଂଶ ବସ୍ତୁ ଏହି ପରମାଣୁ ଗୁଡ଼ିକର ସମାହାରରେ ଗଢ଼ା । ଏହାର ଆକାରକୁ ପିକୋମିଟରରେ ମପା ଯାଇଥାଏ । [1]
ହିଲିଅମ ପରମାଣୁ | ||||||||
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An illustration of the helium atom, depicting the nucleus (pink) and the electron cloud distribution (black). The nucleus (upper right) in helium-4 is in reality spherically symmetric and closely resembles the electron cloud, although for more complicated nuclei this is not always the case. The black bar is one angstrom (୧୦−୧୦ମି or ୧୦୦pm). | ||||||||
ବିଭକ୍ତିକରଣ | ||||||||
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ଗୁଣ-ଧର୍ମ | ||||||||
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