c1

• 6 things about the structure of solid

  Vibrate, Tightly packed, Regular, Fixed, No flow, No compression
• 3 things about the structure of a liquid

  Spread out, Slide pass, lightly compressible
• 4 things about the structure of gas

  Freely moves, Fills container, Compressible, Lots of energy
• whats the relative mass of neutron and proton


  1
• What's the relative mass of an electron?

  0.0005
• how do you work out the atomic mass number

  neutrons + protons
• how do you work out the atomic number

  number of protons
• how do you work out the relative atomic mass

  total mass of all atoms/total number of atoms
• whats the maximum amount of electrons in shell 1,2 and 3

  2,8,8
• whats an isotope

  Isotopes are 2 or more forms of the same element that contain equal numbers of protons but different numbers of neutrons, there mass number differs.
• whats an ion?

  An ion is when an atoms numbers of electrons and protons are not equal. An ion is a atom with positive or negative charge.Positive= ions/cationNegative= anions
• who was the first person in the history of the atom

  Democritus 500 BC- atomic theory- everything is made up of tiny particles separated by empty space.
• who was the second person that came up with the history of the atom

  John Dalton- 1800s -Dalton described atoms as solid spheres making each different element (e.g. fire, water, air, earth) however nobody believed him due to him having no evidence.
• who was the third person that came up with the history of the atom

  JJ Thomson- 1897- Thomson came up with the Plum Pudding Model. His experiment showed that atoms couldn't have been solid spheres and instead contained negatively charged particles. Simplified he described it as positive charged cake mix embedded with negative plums.
• who was the fourth person that came up with the history of the atom

  Ernest Rutherford- 1909- Rutherford's experiment was to take positive alpha particles and fire them at a thin sheet if gold. Most particles went straight through the sheet as Thomson had discovered however some deflected and a few rebounded of the sheet. His theory was the nucleus was positive and there was a negative cloud that was around the nucleus explaining his results
• who was the fith person that came up with the history of the atom

  Niels Bohr- 1913- Bohr suggested that electrons orbit the nucleus in the similar way the planet orbits the sun and they were held together by shells.
• who was the sixth person that came up with the history of the atom

  Rutherford- Later Rutherford discovered protons
• who was the seventh person that came up with the history of the atom

  James Chadwick- Chadwick discovered the neutral neutron