john dalton (1803):\njohn dalton was an english chemist. his ideas form the atomic theory of matter. here…

john dalton (1803):\njohn dalton was an english chemist. his ideas form the atomic theory of matter. here are his ideas.\n• all elements are composed (made up) of atoms. it is impossible to divide or destroy an atom.\n• all atoms of the same elements are alike. (one atom of oxygen is like another atom of oxygen.)\n• atoms of different elements are different. (an atom of oxygen is different from an atom of hydrogen.)\n• atoms of different elements combine to form a compound. these atoms have to be in definite whole - number ratios. for example, water is a compound made up of 2 atoms of hydrogen and 1 atom of oxygen (a ratio of 2:1). three atoms of hydrogen and 2 atoms of oxygen cannot combine to make water.\nwhat is the name of john daltons theory?\nwhat are elements made of?\nan atom of hydrogen and an atom of carbon are \nwhat are compounds made of?\n\nthompson (1897):\nthompson was an english scientist. he discovered the electron when experimenting with gas discharge tubes. he noticed a movement. he called the movement cathode rays. the rays moved from the negative end of the tube to the positive end. he realized that the rays were of negatively charged particles - electrons.\nwhat did j.j. thompson discover?\nwhat is the charge of an electron?\nwhat are cathode rays made of?\ndo electrons move from the negative end of the tube to the positive end?\nwhat was thompson working with when he discovered the cathode rays?

john dalton (1803):\njohn dalton was an english chemist. his ideas form the atomic theory of matter. here are his ideas.\n• all elements are composed (made up) of atoms. it is impossible to divide or destroy an atom.\n• all atoms of the same elements are alike. (one atom of oxygen is like another atom of oxygen.)\n• atoms of different elements are different. (an atom of oxygen is different from an atom of hydrogen.)\n• atoms of different elements combine to form a compound. these atoms have to be in definite whole - number ratios. for example, water is a compound made up of 2 atoms of hydrogen and 1 atom of oxygen (a ratio of 2:1). three atoms of hydrogen and 2 atoms of oxygen cannot combine to make water.\nwhat is the name of john daltons theory?\nwhat are elements made of?\nan atom of hydrogen and an atom of carbon are \nwhat are compounds made of?\n\nthompson (1897):\nthompson was an english scientist. he discovered the electron when experimenting with gas discharge tubes. he noticed a movement. he called the movement cathode rays. the rays moved from the negative end of the tube to the positive end. he realized that the rays were of negatively charged particles - electrons.\nwhat did j.j. thompson discover?\nwhat is the charge of an electron?\nwhat are cathode rays made of?\ndo electrons move from the negative end of the tube to the positive end?\nwhat was thompson working with when he discovered the cathode rays?

Answer

Brief Explanations:

The text clearly states that John Dalton's ideas form the atomic theory of matter. It also mentions that elements are made of atoms, atoms of different elements are different and compounds are made of atoms of different elements in definite whole - number ratios. For JJ Thompson, the text says he discovered the electron while experimenting with gas - discharge tubes and cathode rays are made of electrons which are negatively charged and move from the negative to the positive end of the tube.

Answer:

  • What is the name of John Dalton's theory? Atomic theory of matter
  • What are elements made of? Atoms
  • An atom of hydrogen and an atom of carbon are: Atoms of different elements
  • What are compounds made of? Atoms of different elements in definite whole - number ratios
  • What did JJ. Thompson discover? Electron
  • What is the charge of an electron? Negative
  • What are cathode rays made of? Electrons
  • Do electrons move from the negative end of the tube to the positive end? Yes
  • What was Thompson working with when he discovered the cathode rays? Gas discharge tubes