Periodic Table Flashcards
What are groups
Vertical column of elements
Property of same group
Same valence electron and similar chemical properties
What are group 1 elements
Alkali metals
What are group 2 elements
Alkali earth metals
What are group 17 elements
Halogens
What are the patterns in periodic table
Number of electron shell is period number
Going down the group metallic properties increase
Other than metallic properties increasing down the group what else happens
Size of atom increase
Attraction weaker
Valance electron easily lost
Color and physical states of group 1
Shiny and silvery
Solid (mp is 25)
What is physical trend of group 1
Mp decrease down the group
Why does reactivity increase down group 1
Atomic size increase
So does electron shells
Attraction between positively cherger nucleus and valence electron decreases as it is further away
What is chemical formula of group 17
Diatomic
Color and state of fluorine
Pale yellow and gas
Colour and state of chlorine
Greenish yellow gas
Colour and state of bromine
Reddish brown liquid
Colour and state of iodine
Purple black solid
Color and state of astatine
Black solid
Physical trend in group 17
Colour intensity increase down the group
Mp increase
Why does mp increase down group 17
Covalent substances and exist as simple diatomic molecules
Mass of halo increase, intermolecular foa increase so more energy needed to overcome it
Why reactivity decrease down 17
Atomic size of elements increase so more electron shells
Attraction between positively charged nucleus and valence electron decreases
Harder to attract
Why reactivity decrease down 17
Atomic size of elements increase so more electron shells
Attraction between positively charged nucleus and valence electron decreases
Harder to attract
Properties of group 18
Monatomic
Chemically unchanged
Low mp
