Periodic Table Flashcards
Why does the density of metals down group I increase?
- The number of electrons and protons down the group increases.
- Stronger electrostatic forces between delocalised electrons and protons
Why does the boiling points of metals down group I decrease?
- Atomic redius increases
- Distance from nucleus to valancy electron increases
- Weaker force of attraction
- Less energy needed to overcome the bonds
State the principle of displacement
More reactive element will displace a less reactive element in a compound
State the visible effect of AgNO3 on a solution containing chlorine ions
White ppt forms
AgCl
State the visible effect of AgNO3 on a solution containing bromine ions
Cream ppt forms
AgBr
State the visible effect of AgNO3 on a solution containing iodine ions
Bright yellow ppt forms
AgI
State the visible effect of dilute NH3 on a solution containing chlorine ions
Ppt dissolves
(NH3 displaces Cl-, forming an aqueous solution with the silver)
[Ag(NH3)2]+
State the visible effect of concentrated NH3 on a solution containing bromine ions
Ppt dissolves
(NH3 displaces Br-, forming an aqueous solution with the silver)
[Ag(NH3)2]+
Which of the following is a reducing agent:
Carbon Monoxide
Carbon Dioxide
Methane
Carbon Monoxide
