Sodium
chlorine. across a period the size decreases
Sodium has a larger atomic radius than aluminum.
K
Atomic radii become larger as you go from top to bottom of the periodic chart, but they get smaller as you go from left to right. Therefore, the elements with the smallest radii are in the upper right hand corner. Of S, Al, Na, and Ba, sulfur is the closest to the upper right corner and has the smallest radius of those elements.
Rb is the largest, Li the smallest in the row above. Group 1 of the periodic table: Fr > Cs > Rb > K > Na > Li > H
1 mole Na = 6.022 x 1023 atoms Na 0.200 mole Na x (6.022 x 1023 atoms/1 mole Na) = 1.20 x 1023 atoms Na
Na+ is smaller than Na.
It is Al, Na and O. Al is aluminium, Na is sodium and O is oxygen
Na has a higher atomic radius then Na+, since it still has it's outer electron (3s).
NA
1.19x10^21 atoms of Na
a) Sc,Ti,V,Crb) Na,K,Rb,Csc) B,Si,As,Ted) F,Cl,Br,Ie) Na,Mg,Al,SiThe correct answer of these options is a) Sc,Ti,V,Cr because they are the closest elements to each other in the periodic table.