What would barium do to obtain a noble gas structure

What effect does nuclear radiation have on atoms?

What must happen before a body cell can begin mitotic cell division

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line