परमाणु
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परमाणु (Atom) कउनो तत्व के सबसे छोट भाग ह जेमें उ तत्व के रासायनिक गुण निहित होखेला।
More information Helium atom, Classification ...
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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 (6990100000000000000♠10−10 m or 6990100000000000000♠100 pm). | ||||||||
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