Science: formation of ions

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