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Periodic Table

Periodic table

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PRESENTATION OUTLINE

1.

Dimitri Mendeleev

HE WAS THE FIRST TO START ARRANGING ELEMENTS
2.

MORE INFO

  • The elements were first arranged by atomic mass
  • The scientists predicted more elements and left spaces for them.
  • It was created so people could make sense of over 100 elements.
Photo by dullhunk
3.

Untitled Slide

4.

GROUP 1

THE ALKALINE METALS
All of the metal are reactive with water
They get more reactive as they go down the group.
They are all soft and can be cut by a knife
5.

MORE ON GROUP 1

  • The metals are all reactive to water
  • When they touch the water they create hydrogen gas.
  • They are all soft
  • They all become very hot
  • They all have low melting and boiling points.
  • All have one electron in their outer shell.
6.

GROUP 7

THE HALOGENS
7.

MORE ON GROUP 7

  • All have very low melting and boiling points.
  • The higher up in the group you go, the more reactive the elements get.
  • They become darker as they go down the group
8.

GROUP 0/8

THE NOBLE GASSES
9.

MORE GROUP 8

  • Is the furthest element to the right
  • All very low in density
  • Low melting points which is usual for gasses
  • They are all unreactive
  • They have 8 electrons on their outer energy level
10.

I think that the periodic table is a very useful way to make sense of lots of elements and is a good way to predict other elements that might be out there that we haven't found yet.

Tom Wood