Ionic radius

Question 1

The ionic radius is the

Answer 1

The ionic radius is the distance between the nucleus and the outermost electron of an ion

Question 2

Metals produce positively charged ions…….

nonmetals produce negatively charged ions

Answer 2

cations

(anions)

Question 3

The cations have lost their valence electrons which causes them to be

Answer 3

smaller than their parent atoms

Question 4

The cations have lost their valence electrons which causes them to be much smaller than their parent atoms

Because there are fewer electrons, this also means that there is …. to outer shell electrons

Answer 4

less shielding of the outer electrons

Question 5

Going across the period from Na+ to Si4+ the ions get smaller due to the

Answer 5

increasing nuclear charge attracting the outer electrons in the second principal quantum shell nucleus (which has an increasing atomic number)

Question 6

The anions are larger than their original parent atoms because

Answer 6

each atom has gained one or more electrons in their third principal quantum shell

This increases the repulsion between electrons, while the nuclear charge is still the same, causing the electron cloud to spread out

Question 7

Going across P3- to Cl- the ionic radii decreases as the

Answer 7

nuclear charge increases across the period and fewer electrons are gained by the atoms (P gains 3 electrons, S 2 electrons and Cl 1 electron)

Question 8

What are all the ion charges

Answer 8

Na+

Mg2+

Al3+

Si4+

P3-

S2-

Cl-

Question 9

values of ionic radii

Na+= 0.095 Mg2+ = 0.065 Al3+=0.05

Si4+=0.041 P3-= 0.212 S2- =0.184 Cl-=0.181