27. Predict the boiling point for argon given the boiling points of Krypton (–152°C) and Xenon (–107°C). A) –45°C B) –6

[answerhappygod]

27. Predict the boiling point for argon given the boiling pointsof Krypton (–152°C) and Xenon (–107°C).A) –45°C
B) –62°C
C) –130°C
D) –197°C
29. What is the formula for the ionic compound composed ofbismuth ion, B3+ and SO4–2?
A) (SO4)13B2
B) B2(SO4)3
C) B(SO4)3B
D) B2SO4
30. What is the electron configuration for a titanium (II)ion, Ti2+?A) [Ar]
B) [Ar] 4s2 3d0
C) [Ar] 4s0 3d2
D) [Ar] 4s2 3d2
31. How many valence electrons are in a Na atom and a Mg ion?
A) 1 and 7
B) 1 and 8
C) 1 and 9
D) 1 and 10