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Both are ions and we should consider the ionic radius, not the atomic radius.
Rubidium ion (Rb+) will have a larger IONIC radius than strontium ion (Sr2+).
Both ions have the same electronic configuration. But strontium ion has more number of protons in the nucleus. Hence it will have greater force of attraction between the nucleus and the valence electrons, resulting in smaller size.
What else can I help you with?
What element has the lowest electronegativity barium calcium magnesium strontium?
Barium.
What is least reactive calcium magnesium radium strontium and barium?
Radium is the least reactive among calcium, magnesium, strontium, and barium. Radium is a highly radioactive metal that readily reacts with other elements, but it is less reactive compared to the other listed elements.
What are radium's family members name?
Radium is a member of the group 2 (alkaline earth metals) of the periodic table of Mendeleev; the other members are beryllium, calcium, magnesium, strontium, barium
What are the other family members of radium?
Group 2 (alkaline earth metals): beryllium, calcium, magnesium, strontium, barium, radium.
Elements that are in Akialine Earth Metals?
The alkaline earth metals are beryllium, magnesium, calcium, strontium, barium, and radium. These elements are all metallic in nature and share similar chemical properties, including the ability to react vigorously with water. They are located in Group 2 of the periodic table.
What element has the lowest electronegativity barium calcium magnesium strontium?
Barium.
List all of the alkali earth metals?
Beryllium, magnesium, calcium, strontium, barium, and radium.
How many Alkaline earth metals are there on the Periodic Table of Elements?
Six elements are there. And they are: beryllium, magnesium, calcium, strontium, barium, radium
What members are in the alkaline earth family?
Group 2 elements or alkaline earth metals are beryllium, magnesium, calcium, strontium, barium and radium
What is the trend in electronegativity down group 2from Be to Ba?
The electronegativity decreases going down Group 2 beryllium:1.5; magnesium:1.2; calcium: 1.0; strontium:1.0; barium:0.9
Where are alkaline earth metals?
Beryllium, Magnesium, Calcium, Strontium, Barium and Radium.
Where are the alkaline earth metals?
Beryllium, Magnesium, Calcium, Strontium, Barium and Radium.
What is least reactive calcium magnesium radium strontium and barium?
Radium is the least reactive among calcium, magnesium, strontium, and barium. Radium is a highly radioactive metal that readily reacts with other elements, but it is less reactive compared to the other listed elements.
What are the names of the element calcium's family members?
Calcium is a member of group 2, whose elements are beryllium, magnesium, calcium, strontium, barium and the radioactive radium.
What are the elements in group 2 of the periodic table?
Beryllium, Magnesium, Calcium, Strontium, Barium, Radium
What are 3 important elements in the group of Alkaline earth metals?
magnesium, calcium, barium, strontium
Is the electronegativiy of barium larger or smaller than that of strontium?
The electronegativity of barium is less than that of strontium.
