periodic table Flashcards
1
Q
What is same about elements in the same period? (across)
A
They have the same amount of valence shells
2
Q
What is same about elements in the same group? (down)
A
They have the same valence electrons
3
Q
What is the 1 character as elements goes across the period?
A
Frome metallic to non-metallic
4
Q
chemical property of alkali metals
A
- Reactivity increases down the group
- Most reactive: violently, explosive
Least reactive: quickly, floats on water.
5
Q
What is the name of group 17 elements?
A
Halogen
6
Q
Does reactivity increase or decreases down the group 17?
A
decreases
7
Q
How does displacement reaction happen?
A
When the halogen is more reactive than the halide, which causes displacement
8
Q
list the colors of
Florine, Chlorine, Bromine, Iodine
A
- pale yellow
- greenish yellow
3.reddish brown - black
9
Q
Why are noble gases less reactive?
A
As they have full valence electron shell
