Alkali Metals and Halogens Flashcards
What is an ion
An atom which has gained or lost an electron to fill it’s outer shell
Where are the alkali metals
group 1 of the periodic table e.g sodium
Where are the halogens
In group 7 of periodic table e.g chlorine
What is reduction
The gain of electrons
What is oxidation
The loss of electrons
Where are the nobel gasses
Group 8 of the periodic table e.g Helium
As you go down the alkali metals, do they get more reactive or less reactive
More reactive
As you go down the alkali metals, do they have a higher or lower boiling point
Lower
As you go down the alkali metals, do they get harder or softer
Softer
Give some observations of lithium, sodium and potassium when reached with water
Why do some melt into a small ball
Lithium - Fizzed, moved, floated
Sodium - Fizzed faster, moved faster + melted
Potassium - Fizzed fastest, moved fastest, melted faster + purple flame
Exothermic reaction
Low melting point
What happens to the electrons when the alkali metal reacts
They looses the one electron in the outer shell
Why do all the patterns with the alkali metals occur down the rows
The bigger it gets, then the outer electron is further from the nucleus, so the attraction between the nucleus and outer electron is less
As you react each Halogen with water, does the reactivity increase or decrease the further down the periodic table you go
Decrease
Give some properties of halogens to suggest that they are non metals
Don’t conduct electricity]
Crystals are brittle
Don’t conduct heat
Why is it easy for all halogens to become gasses
Weak intermolecular bonds
