Scientist of the P.T.
This is the number of elements present in a triad created by Doberiener
What is 3 elements?
Alkali metals
Alkaline earth metals
Halogens
Noble gasses
Metals are on this side of the periodic table
What is the Left side
This is the full electron configuration for Carbon (#6)
what is 1s22s22p2 ?
this element has the larger atomic radius Be or Sr
What is Sr
This scientist used atomic number to sort his periodic table
Who is Mosely?
this group is in group number 2
What is the alkaline earth metals
These 2 columns are in the S block
what is group #1 and #2
this element has a electron configuration of
1s2 2s2 2p6 3s2 3p3
what is P Phosphorus?
this is the largest atom on the periodic table
What is atomic mass and properties?
This group contains the most reactive metal
what is the Alkali metals?
(Only 1 valence electron to lose)
This is the number of elements in the 3rd period of the periodic table
Hint periods are rows
(Na, Mg, Al, Si, P, S, Cl, Ar)
what is [Ar] 4s23d104p4
this atom has the highest electronegativity with a value of 4
What is Flourine
These are the 2 things mendeleev did to earn the title of the first periodic table
1. Left blank spaces
2. Sometimes broke the order of increase atomic mass
This group of elements gains one valence electron in reactions
(remember they want to get to 8)
What are the halogens
This element in the 13th group is a metalloid
what is Boron?
touching the bold stair step except Al and Po
This is the Noble core configuration for Osmium
[Xe] 6s2 4f14 5d6
This is how atomic radius changes going across the periodic table left to right
What is decreasing atomic radius