Is a positive ion larger or smaller that its parent atom? Why? ?

2.) As you go from left to right across a period, the first ionization energy generally (decreases or increases) why?


3.) Where is the highest electronegativity found?


4.) Where is the lowest electronegativity found?


Is a positive ion larger or smaller that its parent atom? Why? ?
1) A positive ion is smaller in radius than its parent atom. The reason is that the electrons that are lost to form the positive ion are in the outermost electron shell so only ';inner'; electrons are left. Also, there is some shielding of the nucleus of electrons by other electrons. When some of those outer electrons are lost, there is less shielding and the remaining electrons are pulled in tighter.


2) Generally, it increases.


3) The highest electronegativity is found on the right


4) The lowest electronegativity is found on the left.