Group elements Flashcards
(32 cards)
Group 0 elements are known as
The Noble Gases
Because they have full outer shells they are (g0)
unreactive (inert)
Group 0 exist as (monoatomic/diatomic) particles
Monoatomic
As the number of protons and electrons increases through group 0
the boiling point increases
Why does boiling point increase as the number of protons and electrons increases through group 0
Because larger atoms have more electrons making stronger forces between atoms requiring more energy to break them
Use for He
> Balloons > less dense than air
Uses for Kr
> Lazers and flatscreen
> Filler in double glazing
Uses for Xe
> Lazers and flatscreen > Filler in double glazing > Keeps satellites in orbit > car headlights > Anaesthetic
Properties of Ne
> when an electrical current is passed through it, it produces a light
Use of Ra
> to cure cancer > very radioactive
Use of Ar
> lightbulbs
Group 7 elements are a.k.a.
The Halogens
The most reactive element in group 7
F, because least distance from nucleus and less shielding
Reasons relating to scale of reactivity within a group
> distance from nucleus > stronger attraction nearer nucleus (outer shell)
Shielding > fewer/more shells blocking it
Group 7 exist as (monoatomic/diatomic) particles
Diatomic
Description/property of F2
Pale yellow gas - very poisonous
Description/property of Cl2
Pale yellow/green gas - poisonous
Description/property of Br2
Brown/orange liquid - poisonous
Description/property of I2
Grey solid - purple gas
Description/property of At2
Black solid
Halogens form ionic compounds with
metals
Halogens form covalent compounds with
non-metals
A more reactive halogen displaces
a less reactive halogen from solutions of its salts
Going down group 7 (melting and boiling)
melting and boiling point increase
