When a chemical change occurs,
A.
the colors of the substances involved never change.
B.
new substances with new properties are formed.
C.
it is always because something was burned.
D.
the newly formed substances have the same properties as the old substances.

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!