The nucleus of an atom is dense and positively charged. What was observed when positively charged particles were radiated onto a
2 answers:
<u>Answer:</u> The correct answer is particles that struck the center of the atom were repelled.
<u>Explanation:</u>
Rutherford gave an experiment which is known as gold foil experiment.
In his experiment, he took a gold foil and bombarded it with the alpha particles (carrying positive charge). These alpha particles are also known as helium nucleus. It is represented as .
He thought that these particles will pass straight through the foil, but to his surprise, some of them deflected their path and a few of them bounced back.
From this he concluded that in an atom, a small positive charge in the center is present. Due to this positive charge, the alpha particles deflected their path and some of them bounced straight back from their path.
Hence, the correct answer is particles that struck the center of the atom were repelled.
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Answer:
30, 50
Explanation:
Hello,
In this since an element's atomic number is equal to the number of protons in its atom, we can infer that selenium's atomic number is 30. Moreover, due to the fact the the neutrons are equal to the atomic mass minus the atomic number or the number of protons, by knowing the number of neutrons we compute the atomic as follows:
Thus, answer is 30, 50.
Best regards.