## Sr 2+ or Rb 1+

Darren Nguyen 1F
Posts: 60
Joined: Sat Sep 14, 2019 12:15 am

### Sr 2+ or Rb 1+

Sr2+ or Rb+ . Which has more polarizing power?

Alexa Hernandez 3k
Posts: 74
Joined: Sat Sep 14, 2019 12:16 am
Been upvoted: 1 time

### Re: Sr 2+ or Rb 1+

Rb has the larger Atomic Radius, Consequently Sr has a higher polarizing power.

Darren Nguyen 1F
Posts: 60
Joined: Sat Sep 14, 2019 12:15 am

### Re: Sr 2+ or Rb 1+

Alexa Hernandez 3k wrote:Rb has the larger Atomic Radius, Consequently Sr has a higher polarizing power.

how does Rb have the larger atomic radius?

KMenjivar_3A
Posts: 25
Joined: Mon Jan 07, 2019 8:05 am

### Re: Sr 2+ or Rb 1+

Another way to look at it is if the positive charge of one element is greater than the other one, the element with the greater charge has a higher polarizing power.

Darren Nguyen 1F
Posts: 60
Joined: Sat Sep 14, 2019 12:15 am

### Re: Sr 2+ or Rb 1+

KMenjivar_3A wrote:Another way to look at it is if the positive charge of one element is greater than the other one, the element with the greater charge has a higher polarizing power.

Does the fact that one has more protons matter?

Justin Seok 2A
Posts: 104
Joined: Sat Aug 24, 2019 12:15 am

### Re: Sr 2+ or Rb 1+

Darren Nguyen 1F wrote:
Alexa Hernandez 3k wrote:Rb has the larger Atomic Radius, Consequently Sr has a higher polarizing power.

how does Rb have the larger atomic radius?

A good way of looking at the atomic radius is that when going further down a period, elements have more total electrons and protons. The effect of a proton is more powerful than that of an electron, so the protons in the nucleus pull the electron closer to the nucleus, thus making the atomic radius smaller. Since Rb is earlier on in the period compared to Sr, it would have a larger radius, as the pull of the nucleus isn't as strong compared to the pull of Rb's nucleus.

Darren Nguyen 1F
Posts: 60
Joined: Sat Sep 14, 2019 12:15 am

### Re: Sr 2+ or Rb 1+

Justin Seok 1I wrote:
Darren Nguyen 1F wrote:
Alexa Hernandez 3k wrote:Rb has the larger Atomic Radius, Consequently Sr has a higher polarizing power.

how does Rb have the larger atomic radius?

A good way of looking at the atomic radius is that when going further down a period, elements have more total electrons and protons. The effect of a proton is more powerful than that of an electron, so the protons in the nucleus pull the electron closer to the nucleus, thus making the atomic radius smaller. Since Rb is earlier on in the period compared to Sr, it would have a larger radius, as the pull of the nucleus isn't as strong compared to the pull of Rb's nucleus.

Does it even matter what the charge is then? If protons matter more than electrons