What are POLYATOMIC IONS

1
What are POLYATOMIC IONS?
2
What are POLYATOMIC IONS?
Lets first review what a monatomic ion is
What is a group of atoms with charge?
back to naming compounds
3
In a single atom (monatomic), charge results from
having either more electrons or less electrons
than protons.
4
2
Example The magnesium ion has
two less electrons than protons
5
2
back to polyatomic ions
Example The magnesium ion has
two less electrons than protons
6
(No Transcript)
7
In a polyatomic ion, two or more atoms
covalently bonded together.
8
Together, they carry a charge
9
The nitrate ion (NO3) has, in total, one more
electron than protons
10
When balancing charges in an ionic compound, the
polyatomic ion acts as a single unit of charge
Mg(NO3)2
11
1-
1-
2
Mg(NO3)2
2
12
1-
1-
2
Mg(NO3)2
2
2-
13
back to first slide
back to naming compounds
previous slide