Atoms will _____________ or _____________ valence electrons to become
A quick review…
____________ stable.
Ion – an atom that has _______________ or ________ valence electrons.
___________ - positively charged due to ___________ electrons.
Cations are named by adding “ion” to the name of the atom.
EX:
___________ - negatively charged due to ___________ electrons.
Anions are named by changing the end of the element name
to –ide and add “ion”
EX:
Vocabulary
Draw a Bohr Model of Sodium.
Protons
(+)
Neutrons Electrons
(0)
(-)
Valence electrons
Octect
How would the atom change if it gained an electron?
Valence Electrons –
 The __________________________ atoms have a ________ outer
energy level.
 For most elements, this is an ___________.
o Octet – having __________ valence electrons.
 One way to show the valence electrons of an atom is by
using an ____________________________________________________.
Ion
Cation
Anion
Definition
Picture
Practice
Symbol
Protons (+)
Electrons (-)
Cation or
Anion?
Name of ion
Na+
Ca+2
O2-
Symbol
Bohr Model
F-
Ne
Na+
What do these three models have in common?
How are they different?
Name