Ernest Rutherford contributed to the atomic theory by discovering that the atom is mostly empty space.
He can to that conclusion because he fired alpha particles at gold foil, which was so thin that it was only around .00004 cm thick, and while almost all shot straight through, some actually bounced back!
He likened it to shooting a 15-inch round(bullet) at tissue paper, only to have it bounce right back at you! Based on this, he theorized that the atom is mostly empty, which is why a majority of the particles passed right through, but in the very center of the atom there is a super-dense structure called a nucleus that held a majority of the atom's mass. This super-dense mass would be more than massive enough to deflect the particle, should they collide.
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Most of the states that joined the Union six years after the war were located in the west of the Appalachian Mountains.
<h3>The Union and the Confederates war</h3>
This was the American civil war. This war was fought between the north and the south of the United States.
The civil war had the North trying to stop the south from the use of slaves. The south refused and tried seceding instead.
Read more on the civil war here:
brainly.com/question/1020924
