Chemistry 1.2 - Chemical changes and structure

• What are alkali metals?

  group 1: Lithium, Sodium, Potassium, Rubidium, Caesium, Francium
• What group are halogens?

  Group 7: Fluorine, chlorine, bromine, iodine and astatine
• What group are the transition metals?

  The large block in the middle
• What group are the noble gases?

  Group 8: helium, neon, argon, krypton, xenon and radon
• What are the relative locations of each?

  Proton: In the nucleus

  Neutron: In the nucleus

  Electron: Orbiting the nucleus
• What are the relative masses?

  Proton: 1

  Neutron: 1

  Electron: 0
• What are the relative charges?

  Proton: +

  Neutron: 0

  Electron: -
• What is the mass number made of?

  Number of protons + number of neutrons
• What is the atomic number made of?

  number of protons
• What is the number of electrons the same as?

  number of protons
• What are isotopes?

  Atoms with the same atomic number but different mass numbers
• What is relative atomic mass? (RAM)

  The average mass of all an atoms isotopes
• RAM calculation

  (mass of isotope A x abundance) + (mass of isotope B x abundance) divided by 100
• How are ions formed?

  When atoms gain or lose electrons to try an gain a full outer shell
• Why are ions charged?

  Because the number of protons and electrons are no longer equal
• What is the reactivity of noble gases?

  Very unreactive
• What is the reactivity of Alkali metals?

  Highly reactive and increase in reactivity moving down the column
• What is the reactivity of halogens?

  Generally reactive