2. Who developed the
Periodic Table?
• Dmitri Mendeleev
• Russian chemist and inventor
• He found a new way of
organizing all the elements.
Using his table he predicted
the properties of elements
yet to be discovered
4. How is it Organized?
• Groups - Vertical columns,
organized by their chemical
properties.
• Periods - Horizontal rows, from
left to right by the increasing
atomic number.
• Metals - On the left
• Non-metals on the right
• Metalloids - in the middle
26. Cu
• Name - Copper
• Atomic number - 29
• Element symbol - Cu
• Atomic Mass - 63.546
• Examples. Its used for multi-media,
communications with wiring, and plumbing.
28. Ag
• Name - Silver
• Atomic number - 47
• Element symbol - Ag
• Atomic Mass -107. 8682
• Examples. We use it for tableware, jewelry,
batteries, mirrors, coins, and photography.
30. Hg
• Name - Mercury
• Atomic number - 80
• Element symbol - Hg
• Atomic Mass - 200. 59
• Examples. We use mercury for
thermometers, barometers, filling for teeth,
and electrical switches.