its about Biodiversity

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer