Selenium (Se) has 30 protons and 20 neutrons in each atom, therefore its atomic
number is
and...
Answers: 1
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Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d
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Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li
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Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.
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Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both
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