red and green are opposites assume red and green cancel each other net color = neutral

red and green are opposites

assume red and green cancel each other

net color = neutral

take away one red

take away one red net color = 1 green

take away two red

take away two red net color = 2 green

net color = neutral

net color = 2 red

in this arrangement…

green is trapped inside.Only red ballscan be added ortaken away…

color = 2 green

color = 1 red

color = ?

3 red

color = ?

3 green

In order to understandwhat ions are,we need to know that…

++

++

+

the particlesthat make up atomshave eitherpositive or negative charge

++

++

+

positive and negative are opposites

they cancel each other out

++

++

+

net charge = zero

+

the positive (+) particle is called a

proton

the negative (-) particle is called an

electron

++

++

+

in an atom,protons ( ) are inthe centerand electrons ( )are on the outside

+

++

++

+

only electrons ( )can be addedor taken away

++

++

+

this is an atom with5 electrons and

5 protons

++

++

+

the atom is neutral

net charge = zero

++

++

+

5 (-) and 5 (+) = zero charge (neutral)

++

++

+

++

++

+

++

++

+

charge = ?

++

++

+

charge = 1- (one minus)

++

++

+

++

++

+

++

++

charge = ?

++

++

+

2+ (two plus)

WHEN REMOVING ELECTRONS

WHEN REMOVING ELECTRONS

THE RESULTING CHARGE IS POSITIVE

WHEN REMOVING ELECTRONS

THE RESULTING CHARGE IS POSITIVE

neutral 1+

WHEN ADDING ELECTRONS

THE RESULTING CHARGE IS NEGATIVE

WHEN ADDING ELECTRONS

THE RESULTING CHARGE IS NEGATIVE

neutral 2

WHEN ADDING ELECTRONS

An atom with positive or negative charge

is called andrum roll

ION

Atoms without charge are called ATOMS

Atoms with positive or negative charge

are called IONS

Notice that ONLY the number of e- changes

The number of protons in anAtom NEVER changes

(Only electrons are added or subtracted)

(why?)

ions make up the salt you put on your eggs in the morning

ions are required for your brain to function(ions allow you to see and understand this presentation)

ions are an essential ingredient in soap

ions are required for cellular respiration C 6H 12O 6 + O 2 CO 2 + H 2O

ions make up acids and bases

ions keep your blood functioning

ETCETERA

C 6H 12O 6 + O 2 CO 2 + H 2O

ions make up the salt you put on your eggs in

ions are required for your brain to function(ions allow you to see and understand this presentation)

ions are an essential ingredient in soap

ions are required for cellular respiration

ions make up acids and bases

ions keep your blood functioning

the morning