Atom+Questions


 * __Complete the following questions:__**


 * 1) Who were the first people to offer theories about the nature of matter?**


 * 2) Who suggested that all matter was made from combinations of four different 'elements'; fire, air, water and earth? When did he suggest this?**


 * 3) What Greek word did the word 'atom' come from? What does it mean in Greek?**


 * 4) What did Aristotle do?**


 * 5) What useful techniques did Alchemists develop that are still commonly used today?**


 * 6) What was the 'philospher's stone'?**


 * 7) List 3 of John Dalton's atomic theories.**


 * 8) Who was the first person to clearly distinguish the difference between elements, compounds and mixtures?**


 * 9) What is the law of conservation of mass? What does it state?**


 * 10) What is the collective name of electrons, protons and neutrons?**


 * 11) Which sub-atomic particle did J.J Thompson discover?**


 * 12) Describe what Thompson's model of the atom looked like.**


 * 13) How did Antione Becquerel discover that Uranium ores emit invisible rays?**


 * 14) Which husband and wife team studied radioactive elements?**


 * 15) How did Rutherford test Thompson's model of the atom?**


 * 16) What did Rutherford's model of the atom look like?**


 * 17) Which sub-atomic particle did James Chadwick discover and when?\**


 * 18) What did Frederick Soddy discover?**