PERIODIC TABLE-ALKALI METALS Flashcards
1
Q
Physical properties
A
Melting point:high Conductivity of heat:Good Conductivity of electricity:Good Hardness:Hard Density:High
2
Q
What is the trend in melting points
A
The melting point decreases down the group
3
Q
How many electrons do they have in their outer shell?
How many electrons do they loose when they react
A
They have 1 electron in their outer shell
They loose 1 electron
4
Q
Reactivity: in/decrease because….
The electrostatic between nucleus and the outer electron will in/decrease meaning it is hard/easy to loose in the chemical reaction
A
Increases because the atoms are larger so the negative electron is less attracted to the positive nucleus
Decrease,Easy
5
Q
Reaction with Chlorine
Balancing equations
A
Burns to make a white solid
2,1,2
6
Q
Reaction with Oxygen Flame: Lithium: Sodium: Potassium:
A
Makes a white solid
Lithium:red flame
Sodium:yellow-orange flame
Potassium:lilac flame
