Introduction to Introduction to the Periodic Tablethe Periodic Table

Atomic Number ● Symbol ● Atomic WeightAtomic Number ● Symbol ● Atomic Weight

Element ● Compound ● MixtureElement ● Compound ● Mixture

ElementsElements Science has come Science has come

along way since along way since Aristotle’s theory of Aristotle’s theory of Air, Water, Fire, and Air, Water, Fire, and Earth.Earth.

Scientists have Scientists have identified 90 naturally identified 90 naturally occurring elements, occurring elements, and created about 28 and created about 28 others.others.

The most abundant element in the The most abundant element in the earth’s crust is oxygen.earth’s crust is oxygen.

I am Dmitri Mendeleev!I am Dmitri Mendeleev!

I made the PERIODIC TABLE !I made the PERIODIC TABLE !

What is the PERIODIC What is the PERIODIC TABLE?TABLE?

o Shows all known Shows all known elements in the elements in the universe.universe.

o Organizes the Organizes the elements by chemical elements by chemical properties.properties.

How do you read the How do you read the PERIODIC TABLE?PERIODIC TABLE?

What is the ATOMIC NUMBER?What is the ATOMIC NUMBER?o The number of The number of

protons and protons and electronelectron

What is the SYMBOL?What is the SYMBOL?

o An abbreviation An abbreviation of the element of the element name.name.

What is the ATOMIC WEIGHT?What is the ATOMIC WEIGHT?

o The number of The number of protons and protons and neutrons in the neutrons in the nucleus of an atom.nucleus of an atom.

How did the chemist give symbol to each How did the chemist give symbol to each element?element?

Where did the elements got it’s name?Where did the elements got it’s name?

1. The place of discovery2. Planets name3. The discoverer of the elements4. Named after the name of the scientists5. Based on it’s characteristics

Now you are almost as smart Now you are almost as smart as I am!as I am!

But not as handsome!But not as handsome!Man, I look GOOD!Man, I look GOOD!

Elements, Compounds, Elements, Compounds, and Mixturesand Mixtures

What is an ELEMENT?What is an ELEMENT?o A substance A substance

composed of a composed of a single kind of single kind of atom.atom.

o Cannot be broken Cannot be broken down into another down into another substance by substance by chemical or chemical or physical means.physical means.

What is a COMPOUND?What is a COMPOUND?

o A substance in A substance in which two or which two or more different more different elements are elements are CHEMICALLY CHEMICALLY bonded bonded together.together.

What is a MIXTURE?What is a MIXTURE?

o Two or more Two or more substances that substances that are mixed are mixed together but together but are NOT are NOT chemically chemically bonded.bonded.

Element, Compound or Element, Compound or Mixture?Mixture?

Element, Compound or Element, Compound or Mixture?Mixture?

Element, Compound or Element, Compound or Mixture?Mixture?

Element, Compound or Element, Compound or Mixture?Mixture?

Element, Compound or Element, Compound or Mixture?Mixture?

Element, Compound or Element, Compound or Mixture?Mixture?

You are still not as You are still not as handsome as the great handsome as the great

Mendeleev!Mendeleev!

I am working this beard!I am working this beard!Man, I look GOOD!Man, I look GOOD!