Learning Intention: Explain why ions form.

Learning Tasks

1. Do Now - Answer the two questions in your books. Remember that protons are positive and electrons are negative. 

   1. • If the sodium has 11 protons and 10 electrons, what charge does it have? 

      • If the fluoride ion has a charge of 1- and the atomic number of 9, how many protons and electrons does it have? 

2. Ms Garlick is going to put up some Google Slides to show different sections of the periodic table on the board and she wants you to make observations to determine the patterns in the periodic table. Then copy down the notes she makes. 

3. Complete the Level Up Challenge! If you finish all the levels, you get an extra stamp in your book for this lesson!

Level 2 

What is the trend when it comes to number of electrons gained or loss and the ion formed in the following situations. 

• 1 electron in the valence shell

• 3 electrons in the valence shell

• 5 electrons in the valence shell

• 7 electrons in the valence shell

Level 4 

Sodium (atomic number 11) and potassium (atom number 19) are both in the same group on the periodic table and form +1 ions. Give their electron arrangement and explain how the number of electrons in their valence shells can eb determined from the fact they are in group 1 of the periodic table. 

Level 5

Neon (atomic number 10) and argon (atomic number 18) are both part of the noble/inert gases on the periodic table. Explain why they are very unreactive and do not form ions. 

4. Play Heads or Tails as your final check of understanding. Heads = True, Tails = False

• Atoms and ions are the same thing. 

• An atom that loses electrons will be negatively charged. 

• If an atom has 3 or less electrons in its outer shell, it will lose those electrons and form a positive ion. 

• An atom that gains electrons will be negatively charged. 

• If an atom has 5 or more electrons in its outer shell, it will lose those electrons and form a positive ion. 

This lesson was used on Thursday, August 22nd, 2024, Term 3 Week 5 and that is when it was last updated.