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

## Presentation on theme: "red and green are opposites assume red and green cancel each other net color = neutral."— Presentation transcript:

red and green are opposites

assume red and green cancel each other net color = neutral

take away one red

net color = 1 green

take away two red

net color = 2 green

net color = neutral

net color = 2 red

in this arrangement …

green is trapped inside. Only red balls can be added or taken away…

color = 2 green

color = 1 red

color = ?

3 red

color = ?

3 green

In order to understand what ions are, we need to know that…

+ + + + + the particles that make up atoms have either positive 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 in the center and electrons ( ) are on the outside +

+++++ only electrons ( ) can be added or taken away

+++++ this is an atom with 5 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

THE RESULTING CHARGE IS POSITIVE

WHEN REMOVING ELECTRONS THE RESULTING CHARGE IS POSITIVE neutral 1+

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 an drum 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 an Atom 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

ions make up acids and bases

ions keep your blood functioning

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

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