EL4 - The Periodic Table Flashcards
What is the Periodic Table?
A list of elements in order of atomic number than groups elements together according to their common properties
What are rows and columns of the periodic table called?
Rows - periods
Columns - groups
How are atoms arranged in the periodic table?
Increasing atomic number
Elements in the same group have similar properties because …?
elements in the same group have the same number of e- in the outer shell
What is periodicity?
Regular periodic variation of elements (trends repeated across each period)
What is an example of periodicity?
Across a period
- change from metal to non metal
Down a column
- atomic radius increases
What is the electronic configuration of Oxygen
1s1, 2s2 2p6
Noble gases are _atomic
Monoatomic
What are the types of structures left to right across a period?
Giant metallic, giant covalent, simple molecular
Why are simple molecular structures easy to break?
They contain weak intermolecular forces
Why do elements in the same group have similar chemical properties?
Same number of outer e- in the same type of orbital