What scientist said we cannot predict an exact position of
atoms.

The Heisenberg uncertainty principle states that the exact position and momentum of an electron cannot be simultaneously determined. Warner Heisenberg contributed to atomic theory through formulating quantum mechanics in terms of matrices and in discovering the uncertainty principle, which states that a particle's position and momentum cannot both be known exactly.

Explanation:

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no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.