C3 History of the Periodic Table
- Created by: Simana
- Created on: 27-10-15 18:57
View mindmap
- History of the Periodic Table
- Early 1800s
- Catgorised Elements into 2
- 1) Their physical and chemical properties
- 2) Their Relative Atomic Mass
- No idea of atomic structure + P + E
- No such thing as atomic number
- Could measure relative atomic mass
- known elements arranged in order of atomic mass
- A periodic pattern was seen in the properties of elements
- where the name 'Periodic Table' comes from
- A periodic pattern was seen in the properties of elements
- known elements arranged in order of atomic mass
- Catgorised Elements into 2
- Newlands' Law of Octaves
- Newlands in 1864
- noticed every 8th element had similar properties
- he listed some of the known elements in rows of 7
- noticed every 8th element had similar properties
- Criticised
- groups contained elements with different properties
- e.g. Carbon + Titanium
- mixed up metals and non-metals
- e.g. O + Fe
- did not leave gaps for undiscovered elements
- groups contained elements with different properties
- Newlands in 1864
- Dmitri Mendeleev
- Dmitri Mendeleev in 1869
- Put elements in order of atomic mass
- Left gaps to keep elements with similar properties in vertical coloumns (groups)
- When new elements were found they fiitted the pattern
- Early 1800s
Comments
No comments have yet been made