A. Starting with 1s2draw out the complete electron configuration for the most stable ionof selenium. b. Explain how you used the Octet Rule to determine your answer in part a.

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Why do cells appear different in distilled water than they do in 10% salt water?

Classify this reaction: 2al+n2-> aln.