Alkali Metals. Alkaline Earth Metals Transition Metals.

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Presentation transcript:

Alkali Metals

Alkaline Earth Metals

Transition Metals

InnerTransition Metals These elements are also called the rare-earth elements.

Halogens

Noble Gases

Warm Up 11-3 What do the elements in the same column have in common?

Periodic Table Geography

The horizontal rows of the periodic table are called PERIODS.

The vertical columns of the periodic table are called GROUPS, or FAMILIES. The elements in any group of the periodic table have similar physical and chemical properties!

The History of the Modern Periodic Table

Dmitri Mendeleev In 1869 he published a table of the elements organized by increasing atomic mass. Elements with similar properties were grouped together.

However, in spite of Mendeleev’s great achievement, problems arose when new elements were discovered and more accurate atomic weights determined.

Henry Moseley He rearranged the elements in order of increasing atomic number.

Henry Moseley His research was halted when the British government sent him to serve as a foot soldier in WWI. He was killed in the fighting in Gallipoli by a sniper’s bullet, at the age of 28. Because of this loss, the British government later restricted its scientists to noncombatant duties during WWII.

Periodic Law When elements are arranged in order of increasing atomic number, there is a periodic pattern in their physical and chemical properties.