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Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.
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Compare and contrast physical changes with chemical changes.
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Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .
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Complete the paragraph to describe the characteristics of a borane molecule (bh3). the lewis structure and table of electronegativities are given. the bond polarities in bh3 are , the molecular shape is , and the molecule is .
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Dacă intr-o scoica se introduc câteva picături de acid se observa apariția efervescenței. scoica con...
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