Most elements, with the exception of a few like hydrogen, want to have electrons in the outer energy level.

The answer is 1.

Most elements, with the exception of a few like hydrogen, want to have 1 electrons in the outer energy level.

Hydrogen has 1 electron in its outer shell, it requires two electrons to be in stable state. It can hold upto, two electrons in it's outer shell.

answer:

b. 69

explanation:

answer:

i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket.   your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing).   good luck!   i hope you do well!