deck_15392094 Flashcards
As you go down group 0 what happens to boiling and melting point of elements and why?
Increase due to the Ram also increasing.
What is the name of Group 1 metals?
Alkali metals
As we go down the group 1 what happens to the reactivity and why?
Reactivity increases as Radius increases so the outer electrons are futher from nucleus so less attracctiong.Adding on there is electron shielding.This leads to electron being more easily lost.
How does group 7 elements exist?
Diatomic elements.
What happens to the melting point,Boiling point and the Ram as we go down group 7.
All increase.
Whan Halogens (Group 7 )Become an ion what is there ending?
-ide
What happens to reactivity in Group 7 as you go down.
Decrease.Halogen need to gain electron.Radius increases so the outer electron are futher from nuclues so there is less attraction of a elextron+Electron shielding.
What were the 2 things that the alpha particle method unveailed about the atom.
1.Mass of atom concentrated in centre,Nuclues.
2.Nuclues was charged
What is a plum pudding model?
An atom is a ball of
positive charge with negative electrons embedded in it.
Which scientist came up with outer elecron shells.
Niels Bohr
Who discovered neutrons.
James Chadwick
What happens to boiling point and melting point dow group 0?
Increases
Isotopes have…
Same number of Proton different number of neutrons
How to find RAM of isotopes with abudnance?
(massxabundance)+(massxabundance)/100
What is the formula for concentration?
mass/volume or moles over volume
What happens an the anode?
Pulls in electrons.
What is the process of anode called?
Oxidisation
What happens cathode?
Gives electrons out?
In the universal indecator what would deep red suggest?
An acid
In the universal indecator what would blue/purple represent?
An alkali
What is a neutralisation reaction?
A reaction between acid and a base.
What does a neutralisation reaction form?
Salt + Water
What ions are in acid?
H+
What ions are in alkali?
OH-
For aqeous solution what is the rule for the anode?
Oxygen will be produced unless their is a halide(7()ion
For aqeous solution what is the rule for the Cathode?
Hydrogen will be produced if metal is more reactive.
How do we go from cm^3 to dm^3
/1000
What happens when a metal carbonate reacts with a less reactive acid(HCL) ?
Forms a salt +water +co2
What does a strong acid do?
A strong acid is and acid that dissociates or ionizes completely when in solution.
What does a weak A strong acid is and acid that dissociates or ionizes completely when in solution.acid do?
A weak acid is and acid that partially dissociates or ionizes completely when in solution.
What is the avragado constant
6.022 × 1023 atoms per mole
