Features of the stable noble gas electronic structure
- fully filled valence e shell- complete duplet or complete octet of electrons- do not have to gain or lose e -> stable and un reactive
In which group number do the elements have a noble gas electronic structure?
Group 18 (aka Group 0)
What do other atoms that do not have a noble gas electronic structure want to do? How do they do it?
- want to achieve the same electronic structure as the noble gases- by gaining or losing e: forming ions- by sharing e: forming molecules (eg H2O, CO2, H2, N2)
How are ions formed?
- when atoms gain or lose electrons: no. of p and e are no longer the same- particles now have a net +ve or -ve charge
What are positive ions called? How are they formed?
- cations- lose e
What are negative ions called? What is so special about their ion names? How are they formed?
- anions- name has '-ide'- gain e
What is the zinc ion?
Zinc cation, Zn2+
What is the silver ion?
Silver cation, Ag+
What is the Boron ion? Is it even an ion?
Boron cation, B2+- boron is a non-metal so cannot form cations
Can elements from group 3-12 form ions?
No- grp 3-12: transition elements -> diff electronic structures
What is the Hydrogen ion?
Hydrogen can form both cation and anion: H+ or H-
Can elements from group 14 form ions?
No- grp 14: 4 valence e -> not learning in sec 2