The Periodic Table

Dmitri Mendeleev• A Russian Chemist that put together the first

Periodic Table.• Predicted the existence of unknown elements• Made one error…He put the elements in

order based on Atomic mass, not Atomic Number, which was later corrected.

• His table revolutionized the field of Chemistry forever.

Review• Parts of the Atom:

Protons

Neutrons

Electrons

Nucleus

Electron Cloud

Important Terms

• Atomic Number – the number of protons in the element

• Atomic Mass – the number of protons plus neutrons in the element

• Element – A substance composed of atoms having an identical number of protons in each nucleus.

• Symbol – Abbreviation for an element that is unique to each element

Important Terms (cont.)

• Periodicity – The quality, state, or fact of being regularly recurrent or having periods, the completion of a cycle, a series of events, or a single action.

• Groups/Families – Columns on the Periodic Table; elements with similar properties and characteristics

• Rows – Run left to right and indicate the position of electrons in the atoms of elements

Groups/Families/Series

• Alkali Metals

• Alkaline Earth Metals

• Transition Metals

• Halogens

• Noble Gases

• Lanthanide Series

• Actinide Series

• Metalloids

• Other Common Metals

• Other Nonmetals

Periodic Squares

• Whole numbers represent the Atomic Number of the element and place on the Periodic Table.

• Capital Letter or Capital Letter with lower-case letters represent the symbol of the Element.

• Name is usually given on bigger tables.

• Decimal number represents the average atomic mass of that element.

(Based on isotopes)

1

HHydrogen

1.009

Uses for the Periodic Table• Classifying elements and their physical

and chemical properties

• Provides a great deal of information about the elements and their atoms, such as number of protons, electrons, and neutrons, and bonding capabilities.

• Gives information to use in mathematical calculations and conversions.

Uses (cont.)

• Industrial uses, such as making alloys, hardening glass, making new fuels, and determining the chemical composition of certain substances.

• Commercial uses, such as making jewelry, cameras, fabrics, fireworks, tools and appliances, and neon signs.

Your Own Periodic Table!