Why do you have to pay for everthing it should be free for new user for like a week

Which orbitals form a pi bond? a.the s orbital and three p orbitals b.the s orbital and two p orbitals c.overlapping p orbitals d.overlapping hybrid orbitals

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes