A unknown element is a gas at room temperature, has 8 valence electrons and 22 neutrons the element is most likely

Football players often sustain lateral blows to the extended knee. which of the ligaments is (are) damaged as a result? a. suprapatellar b. oblique popliteal and extracapsular ligament c. medial collateral, medial meniscus, and anterior cruciate d. arcuate popliteal and the posterior cruciate

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above