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परमाणु (Atom) कउनो तत्व के सबसे छोट भाग ह जेमें उ तत्व के रासायनिक गुण निहित होखेला।
Helium atom | ||||||||
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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 ( m or 10−10 pm). 100 | ||||||||
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