I'm confused what valence electrons are ? idk if they're the same as just regular electrons

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Drug abuse will not lead to physical and psychological dependence. true or false ?