#1. which of the following is a reasonable ground-state electron configuration? a.-1s21p62s22p63s2/ b. -1s22s22p63s23p64s24d8/ c. -1s22s22p63p6/d. -1s22s22p63s1 #2. which of the following is a possible noble gas notation? a.-[xe] 6s26p6/b. -[kr] 5s25d85p6 /c.-[xe] 6s25d106p4/d. -[kr] 5s24d105p3

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g

Arectangle has a diagonal 20 inches long that forms angles of 60 and 30 with the sides. find the perimeter of the rectangle. for geometry