1) Periodicity Flashcards
1
Q
Define periodicity
A
The repeating pattern of trends across different periods
2
Q
What are periods
A
The horizontal rows of elements
3
Q
What are groups
A
The vertical columns of elements
4
Q
What is the general trend across a period
A
- Atomic radius decreases
- Outermost electrons in the same shell
- Number of protons increases
- Nuclear attraction on outermost electrons increases
5
Q
What is the general trend down a group
A
- Atomic radius increases
- More shells
- Greater distance of outermost electron to nucleus
- More shielding on outermost electron from inner electrons
- Nuclear attraction on outermost electrons decrease
- Although number of protons increases this is far outweighed by more distance and shielding
