Please enable JavaScript.
Coggle requires JavaScript to display documents.
The properties of Halogen & Noble Gases (Noble Gases (Present in…
The properties of Halogen & Noble Gases
Halogen
Highly Reactive Elements
As they need 1 more electron to complete the octet structure.
Reactivity decreases down in the group
Fluorine is the most reactive
Particularly reactive with the alkali metals and alkaline earths
They form colored vapour
Elements
fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).
Produce sodium salts of similar properties
Halite is best known
Great reactivity causes free halogen elements to not be found in nature
Chlorine is the best known of the halogen elements
Are reactive nonmetals have seven valence electrons
The halogens have very high electronegativities
Fluorine has the highest electronegativity of all elements.
Noble Gases
Have achieved octet structure
Highly unreactive due to this octet structure
Hardly form compounds with other elements
Exist in monoatomic elements
Make up a group of elements with similar properties
Order in density - helium, neon, argon, krypton, xenon and radon
Present in atmosphere though in small amounts
0.934% Argon
0.0018% Neon
0.00052% Helium
0.00011% Krypton
0.000009% Xenon
Extracted from the air except helium as it is a radioactive decay
Comes from naturally gas (7%)
Most stable due to the fact that they have the maximum amount of valence electrons the outermost shell can hold
Makes the less reactive with other elements due to stability
They all conduct electricity, fluoresce - oderless and colorless
Previously referred to as inert gases though not accurate as majority do not take part in chemical reactions