a general answer is that if it is a cation the ion is smaller than the atom due to loosing one or more electrons which would decrease the size of the radius anions are larger because they are gaining more electrons and electron electron repulsion is greater which spreads the anion apart
The cationic radius of the Barium ion is 149pm (pm is picometer). The cationic radius of caesium is 181pm. So, the barium ion in terms of ionic radius is smaller than the caesium ion.
Yes
Yes.
yes
Yes.
Yes, Yes it does
No, BaBr2 is soluble.
Yes, barium and chloride do not form a precipitate and hyrogen and nitrate will form nitric acid. Yes, barium and chloride do not form a precipitate and hyrogen and nitrate will form nitric acid.
yes
yes
Yes..Aluminium has a larger charge (more electrons) and the electrons cloud are more compress to the nucleus (small atomic radius) compared to Sodium. So the density of Aluminium is larger and this leads to better conductivity of electricity.
Yes. Barium Iodide is soluble in water.
Yes, barium is soft and malleable.
Yes, 1.5 is larger than 1.02.
Yes, it is.
Yes.
Yes, because it is lower down in the group.
Yes, 002 is larger than 0005.
58 is larger than 23 by 35
Yes, barium is super rare!