Group 1 - Alkali Metals Flashcards
1
Q
Soft or hard?
A
Soft
2
Q
High / low density?
Density … down the group
A
Low
Increases
3
Q
When they are cut…
A
They are silvery and shiny but quickly tranish.
4
Q
Low / High melting and boiling points?
Melting point … down the group.
A
Low
Decreases
5
Q
Why does melting point decrease down group?
A
Because distance between nuclei and the sea of electrons increases down the group, so force of attraction decreases so less energy is needed to break metallic bonds.
6
Q
Very reactive/ not very reactive?
A
Very reactive
7
Q
Reactivity … down the group
A
Increases
8
Q
Why does reactivity increase down the group?
A
Because distance between nucleus and valence electrons increases, therefore electrotatic forces of attraction decrease. It is easier for valence electrons to leave.
