Studied by 4 people
Argon
________- filling (tungsten) light bulbs to stop the filament reacting with oxygen.
Helium
________- filling balloons and aircrafts because it is lighter than air and will not catch fire.
Periodic table
The ________ is a method of classifying elements.
Neon
________- is used in advertising signs because it glows red.
Elements
________ are arranged in order of increasing atomic number (each proceeding ________ has one more proton)
Period number
number of electron shells
Group number
number of valency electrons (outer shell electrons)
Group I metals
Lithium, sodium and potassium
Fluorine
Yellow gas
Chlorine
Green gas
Bromine
Red liquid
Iodine
Black solid
Helium
filling balloons and aircrafts because it is lighter than air and will not catch fire
Argon
filling (tungsten) light bulbs to stop the filament reacting with oxygen
Neon
is used in advertising signs because it glows red
Note 
Flashcard (24)