How did scientists discover the structure of an atom?
Answers
Answer:
toh kya ho gya spelling he toh glat likhi sb sry mat bolo nhi toh marunga
Explanation:
hi good morning
Read the extract and complete the activities given below. (12) I have been asked many summit, I did not think of who was going to be "first." I am sure that Hillary was not thinking that. Climbing takes all your attention. You have many more important worries. times, "Who was first?" When we were within reach of the What does it matter whether I reached the top first or Hillary? Our main thought was that both of us reach the top. We had to. One couldn't do it alone. If there had been a difference of one thousand feet between us, then one could make the claim that he was first. But even then, only the man behind him could confirm the distance between the two of them. When we reached Kathmandu we discovered that a controversy had arisen. We talked it over, Hillary, Colonel Hunt and I. We agreed that all the talk was childish. So we made a pact, and each of us signed it in the office of the Prime Minister of Nepal. Each one signed his own statement. I have a copy of Hillary's statement which I carry in my pocket. It reads: "Kathmandu, June 22, 1953." "On May 29th, Tenzing Sherpa and I left our high camp on Mt. Everest for our attempt on the summit. As we climbed upwards to the South Summit, first one and then the other would take a turn at leading. We crossed over the South Summit and moved along the Summit ridge. We reached the summit almost together. We embraced each other overjoyed at our success, then I took photograph of Tenzing holding aloft the flags of Great Britain, Nepal, the United Nations and India." (Signed: E.P. Hillary) There is another paper like this in English, signed by me. Thus, we will not take part in any controversy. As the statement says, Hillary and I embraced when we reached the top. We did as well as our bulky equipment would let us. I remember saying to him: "We have done it." But we couldn't hear. We had our oxygen mask on. A1. Global Understanding (2) Describe the opinion of Tenzing about the question- Who was the first?" A2. Complex factual (2) Rewrite the statement choosing the correct alternative. 1) The pact was signed in the office of the Prime Minister of India/Nepal. 2) Tenzing had a copy of his / Hillary's statement. 3) The two mountaineers did not care / cared about reaching first to the summit. 4) Tenzing held flags of India, Great Britain, Nepal and United Nations/United States of America. (2) A3. Interpretation Give the list of Tenzing's activities after reaching at the summit. (2) A4. Personal Response Give your opinion: We should participate in adventure sports because (2) AS. Language Study Do as directed 1) Tenzing and Hillary made a pact at the office of P M of Nepal. (Begin the sentence with -A pact) 2) Hillary and I embraced each other. (Use not only -----but also) A6. Vocabulary (2) Fill the letters to get meaningful words from the extract. Use hints given in the bracket. 1) s-m-i- (Top of the mountain) 2) c-l-n-1 (Post in the military) 3) p-c (Formal agreement) 4) e-b-a-e- (Held closely in one's arms)
Answer:
The idea that everything is made of atoms was pioneered by John Dalton (1766-1844) in a book he published in 1808. ... For almost 100 years after this, most scientists thought of atoms as solid structures, until in 1897 J.J. Thompson discovered that atoms contained even smaller particles called electrons.
The first experiment to really delve into the structure was Thompon's experimental proof that "cathode rays" were rays of electrons, which in turn had to be constituents of the atom (J. J. Thomson).
Next was Millikan's "Oil Drop Experiment", which established the mass/charge ratio of the electron. Between the two of them, this allowed the formation of the "Thomson model" for the atom, where the electrons balanced the charge of the protons, but were embedded in the atoms like raisins in a pudding.
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