Science

• Renewable


  Natural sources of energy that will never run out
• carbon-free


  no fuel emission
• non-renewable


  sources of energy that will eventually run out and negatively impact the environment
• What and how do alkali metals react with and where are both groups from

  Group 1 metals react w Group 7 non-metals vigerously
• How are G1 alkali metals conservedand why?

  in oil or argon as they are reactive
• Name a pattern of reactivity in the Group 1 alkali metals and give a scientific explanation

  As you go down the Group 1 alkali metals, the reactivity increases.

  The electrons in the outer shell become further away from the nucleas due to the amount of shells causing a shield resulting to less positive attraction. It then becomes easier to react to become stabilised due to the opposite attraction
• Groups are ordered


  across
• What does the number group tell us

  How many outer electrons there is
• What position is the atomic mass and atomic number

  Atomic mass: top

  Atomic number: bottom
• Periods go 


  downwards
• Periods tell us


  The number of shells
• Periodic table timeline


  John Dalton

  John Newlands

  Mendeleev

  Current time
• John Dalton's belief (Periodic time table)


  ordered in atomic weight
• John Newland's belief (Periodic time table)


  Law of Octaves: built on Dalton's idea, order of atomic mass and realised the properties of every eighth element shared a similarity

  _assumed all elements have been discovered
• Mendeleev's belief (periodic time table)

  Arranged the 50 elements in their atomic mass. Then arranged in a way there was a periodic pattern in their properties. He left gaps for undiscovered elements and used the pattern to discover them.

  _e.g Argon didn't fit this
• How is the periodic table arranged

  In the number of atomic number
• Why do elements in the same group react in similar ways

  Due to the same number of electrons in the outer shell
• Non-metals are normally


  insulators
• Noble gases aren't stable true/false

  FALSEEE
• Noble gases are what group

  0