2.8 explain the relative reactivities of the elements in Group 1 in terms of distance between the outer electrons and the nucleus.

This is a paper 2 separate science fact
  • Group 1 elements get more reactive, or more unstable as you go down the group.


  • Group 1 elements need to lose one electron to react
  • Electrons are held in place by the protons in the nucleus
  • The closer the nucleus is to the electron, the stronger the force will be
  • Therefore, the further away the nucleus is to the electrons, the weaker the force keeping them together will be.


  • Bigger atoms (the ones with more shells, lower down in the group) will have their last shells very far away from the nucleus
  • This means the electron will be lost easier
  • Therefore it reacts more easily/quickly/vigorously
  • Smaller atoms (higher in the group) are less reactive as it takes much less energy to break the force.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s