Which of the following would have to lose three electrons in order to achieve a noble gas electron configuration?
si mg al cl p
a. cl
b. p
c. mg, al, p
d. al
e. si, p

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Condensation happens when water vapor cools. true or false? ?

Can someone me out on this question for my national 5 chemistry homework