What is wrong with the electron configuration below?
1s2 2s2 2p5 3s2 3p6 4s1

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Draw the structure for 5-isopropyl-2-methyl-3-nonene