Read what this module is aiming for. Then open the instrument and work through it.
The atomic radius is the distance from the nucleus out to the furthest electron. For carbon, that means the valence shell — the electrons outside the core.
Before we move on, we are going to practice creating a hypothesis.
Create a hypothesis for these two questions:
Make sure you are thorough in your reasoning.
Write them down and check as you go. Be prepared to share at the end of class.
The radius decreases moving left to right on the periodic table; does this match your hypothesis? Why might this be the case?
Look what happens as we move down the group, how would you describe this change?
Now that we know what happens when we move across and down the periodic table, could you hypothesize what happens when we make IONS from atoms?
Write it down and check as you go. Be prepared to share.
Grab sodium’s outer electron and drag it onto chlorine — see how it matches your hypothesis.
A few more — neutral atom beside its ion.
Across a period atoms shrink. Down a group they grow.
Look at how far the outermost electron sits from the nucleus.
The intentions behind this module, and the competencies you just practised. Read each competency statement and decide honestly how well it fits you right now.