Which is the electron configuration for boron?
1s22s3
1s22s23s1
1s 2s22p2
1s22s22p?

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Answer explain why it is not possible to deduce a complete order of reactivity.