If potassium (K) has a density of 0.86 g/cm3, which element would have a similar density?
A.
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If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?
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Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: cl- s -2 k+ ca +2 ne
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