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Margaret [11]
3 years ago
8

Which elements have 8 valence electrons?

Chemistry
2 answers:
Darina [25.2K]3 years ago
6 0
Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr). if that’s what u mean
notka56 [123]3 years ago
6 0

Answer:

Any element in group 18 has eight valence electrons (except for helium, which has a total of just two electrons). Examples include neon (Ne), argon (Ar), and krypton (Kr).

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1) You need to get volume of both temperatures by using first attached formula V= Mass/DensityV_1 = (3.250 g)/(13.596 g/(cm^3)) = .2390 cm^3
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2) Using the second formula you get the height of 0 degree 
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h_1 =(.2390 cm^3)/(pi*(.009 cm)^2)  = 939.2 cm

(radius in cm is (0.180 mm) / 2 * (1 cm)/(10 mm) or .009 cm

3) Then with h1 you can easily get the height of 25 degrees 
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