Pls help me I don’t understand it’s for my science class. Plz check if correct and tell me wether each is element or compound

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory