close search
Hit Return to see all results

Predict the larger ion in each of the following pairs.(a)   Rb+ or Sr2+    _________rubidium ion or strontium ion(b)   Co2+ or Co3+    _________cobalt(II) ion or cobalt(III) ion(c)   S- or S2-    _________sulfur -1 ion or sulfide ion(d)   Br- or I-       _________bromide ioniodide ion


Predict the larger ion in each of the following pairs.

(a)   Rb+ or Sr2+     _________rubidium ion or strontium ion
(b)   Co2+ or Co3+     _________cobalt(II) ion or cobalt(III) ion
(c)   S- or S2-    

_________sulfur -1 ion or sulfide ion

(d)   Br- or I-        _________bromide ioniodide ion
Step 1

Atomic radius trends in periodic table:

Atomic radius decreases (caused by the number of protons and electrons are increases) from left to right within a period of the periodic table.  Atomic radius increases (because of electron shielding) from top to bottom down within a group of the periodic table.  And also atom has more number of protons than electrons that will be smaller in size.

Step 2


Given pair is Rubidium ion (Rb+) and Strontium ion (Sr2+).  Strontium ion (Sr2+) has more number of protons than Rubidium ion (Rb+).  Therefore, Rubidium ion (Rb+) has larger radius.

Step 3


Given pair is Cobalt(II) ion (Co2+) and Cobalt(III) ion (Co3+).  If the attractive force increases between nuclei and outer electron t...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Our solutions are written by experts, many with advanced degrees, and available 24/7

See Solution
Tagged in



Related Chemistry Q&A

Find answers to questions asked by student like you

Show more Q&A add

Q: 3. Which of the following is the Lewis dot structure for the fluoride ion? a. b. c.

A: The fluorine atom forms fluoride, which has 8 valence electrons, and is isoelectronic with a Noble G...


Q: The flask shown here contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret...

A: In this problem, the volume of sodium hydroxide can be calculated only when the initial concentratio...


Q: Question 10 of Chapter 4, General Chemistry: Principles and Modern Apps by Petrucci   Write balance...

A: A balanced chemical equation is used to represent the given chemical reaction in the forms of symbol...


Q: what is the correct name of Au3(PO2)2

A: Oxidation number of Au is determined as given below.


Q: What is the molecular formula for a Hydroxyl group?  What is the molecular formula for an Amino Grou...

A: Hydroxyl group:Hydroxyl group consists of oxygen bonded to hydrogen and the formula is OH.Amino grou...


Q: The following set of redox reactions takes place between iron dipped in a solution of copper ions.  ...

A: When solid iron dips into copper solution, iron undergoes oxidation that is loss of electrons and co...


Q: The age of wine can be determined by measuring the trace amount of radioactive tritium. Tritium is f...

A: Radioactive decay follows first order kinetics. Tritium is a radioactive isotope of hydrogen and fol...


Q: I don't even know what lithium dicyclohexylcuprate looks like and I can't seem to find it on the int...

A: Acetophenone reacts with butyllithium to give vinyl alcohol.


Q: can you explain how to convert Newman projections to line angle formulas? and provide a few examples...

A: Newman Projection to Bond-Line notation :Newman projection visualizes the conformation of a chemical...

Sorry about that. What wasn’t helpful?