1) Briefly describe how Rutherford\'s gold foil experiment changed the way we th
ID: 576369 • Letter: 1
Question
1) Briefly describe how Rutherford's gold foil experiment changed the way we think about the structure of the atom. Include the prevailing theory-our general understanding- of the atom both before and after the experiment. 2) Give the number of protons, neutrons, and electrons for each atom or ion below: "of protons (p") |#0f neutrons (n) | #0f electrons (e) Symbo sse 18F 4Fe* 3) What is the mass of 2.53 moles of Al? Gallium-69 has a mass of 68.9256 amu and a natural abundance of 60.108%. If there are only two naturally abundant isotopes of gallium, what is the mass in anu of the other isotope 4) IFExplanation / Answer
1. The theory before Rutherford's experiment was that the atom is a positively charged body that contains small negatively charged particles called electrons. This was described as the plum pudding model of the atom given by JJ Thompson. He also said that the positive charge in the atom is balanced by the negative charge. This was disproved by the experiment conducted by Rutherford when he discovered the nucleus in the atom.
He bombarded alpha rays onto a gold foil and observed the deflection of the rays. Most of the alpha particles passed through the foil. Some of them were deflected and a few of them bounced back in the opposite direction. This led to the conclusion that the positive charge in the atom is concentrated in the center and the electrons are embedded around this positive center.
The following were the conclusions based on Rutherfords model:
most of the mass in the atom is concentrated at the center of the atom.
high central charge was concentrated at the center of the atom in an area which is very small compared to the rest of the atom.
Pls post one question as per guidelines.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.