Chemistry Paper 1 - Periodic Table
- Created by: Jmalik123
- Created on: 01-02-20 20:14
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- 1800's
- Periodic Table
- 1869 Dmitri Mendeleev
- Took 50 know elements and arranged them into his table with various gaps
- Mainly put them in order of atomic mass
- Left gaps so similar elements stayed in to the same group
- Indicated undiscovered elements
- When found it confirmed his idea
- Indicated undiscovered elements
- Isotopes confirmed that why he had no strict order
- 2020's
- 100ish elements in the periodic table
- Group number tells you amount of electrons in the outer shell
- Predict the reactivity and trends of the groups
- Rows are called periods
- 1869 Dmitri Mendeleev
- Two ways to categorise the elements
- Physical and chemical properties
- Relative atomic mass
- Arranged by atomic mass
- Some elements were not complete and some were placed in the wrong group
- Periodic Table
- Ranged in order of increasing atomic proton number
- Shows repeating pattern in the properties
- Columns for repeating patterns which are called GROUPS
- 2020's
- 100ish elements in the periodic table
- Group number tells you amount of electrons in the outer shell
- Predict the reactivity and trends of the groups
- Rows are called periods
- Shows repeating pattern in the properties
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