A(n) is an abbreviation for the name of an element and has either one or two letters.
1.) atomic mass
2.) chemical symbol
3.) nuclear fusion
4.) periodic table
5.) group
6.) plasma

How does friction with the atmosphere affect the speed of an artificial satellite

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?