Question

1. Democritus, a Greek phlosopher, said that matter is 2. What dpes the Greek word atomos mean? 3. About 350 B.C., Aristotle stated that bath and are continuous 4. What are the five postulates of Daltoan's atomic theary? 5. (a) When electricity was applied to a gas filled seal tube, the tube began ta glow and emit aan (b) This eventually led to the discovery of a negatively charged particle caled alan called a/an and a positively charged particke 6 JJ. Thomson's model of the atom became known as the Model, 7. (a) When Ernest Rutherford fired alpha rays at thin gold fails, most af the particles the foil (b) Rutherford interpreted his results, saying that an atom is largely 8. What did James Chadwick discover in 1932?

Answer 1

Democritus, a Greek philosopher said that matter is consists of various imperishable indivisible elements which he called atom. "atom os", is Greek word means atom. ( English word). About 300 B C Aristotle stated that both matter and motion are continuous. Postulates of Dalton Theory: 1. All matter made up of indivisible particles called atoms. 2. Atoms of same element can combine in more than one ratio to form two or more compounds. 3. Atoms of the same element are similar in mass and shape but differ from the atoms of other elements. 4. The atom is the smallest unit of matter that can take part in a chemical reaction. 5. Atoms can not be created or destroyed. 6. Atoms of different elements may combine with each other to form compound atoms. 5. a. When electricity was applied to a gas filled seal tube, the tube began to glow and emit a/an light. b. This eventually led to the discovery of a negatively charged particle called a/am electron and a positively charged particle called a/an nucleus. J.J. Thomson's model of the atom became known as the Plum Pudding Model. a. when Ernest Rutherford fired alpha rays at thin gold foils most of the particles passed straight through the gold foil and a few particles were deflected more than 90 degrees from their path. b. Rutherford interpreted his results saying that an atom is largely empty space with a tiny, dense, positively-charged nucleus. James chadwick discovered Neutron in 1932.