Naturally occurring boron (B) contains 80.0% 11B (11.01 amu) and 20.0% 10B (10.01 amu). Calculate the average atomic mass of boron in amu. (10.81 amu)

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Which of these sequences lists the correct order for the creation of sedimentary rock from sediment? a. deposition, burial, compaction, cementation b. burial, deposition, compaction, cementation c. compaction, deposition, burial, cementation d. cementation, deposition, burial, compaction

What is the lowest number energy level where a d sublevel is found