Question

How can atoms collapse or why are atoms stable? Ans._________________________________________________ ii. Why does an atom give a line spectrum? Ans._________________________________________________ iii. How was it proved that the whole mass of an atom is located at its center? Ans._________________________________________________ iv. How was it shown that atomic nuclei are positively charged? Ans.__________________________________________________

Answer 1

Answer:

$\text{i)An atom is stable because of a balanced nucleus that does not conta-}$ $\text{-in excess energy}$

$\text{ii)Because atoms have quantized energy levels}$

$\text{iii)The proof that the bulk of the atom was at the centre was the Ruthe-}$ $\text{rford model,which resulted by shooting a ray of beta particles (electrons)}$ $\text{into a gold leaf, and most of these went straight through}$

$\text{iv)Rutherford deduced that the atomic nucleus was positively charged}$ $\text{because the alpha particles that he fired at the metal foils were positiv- }$ $\text{-ely charged, and like charges repel. Alpha particles consist of two prot-}$ $\text{-ons and two neutrons, so they are positively charged}$

Answer 2

Answer:

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