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The elements beryllium, calcium, and strontium are all in group 2. What is the correct order based on atomic size?

A. Ca < Be < Sr
B. Sr < Be < Ca
C. Be < Ca < Sr
D. Sr < Ca < Be
E. Ca < Sr < Be

Answer :

Final answer:

The correct order of the elements beryllium, calcium, and strontium in Group 2 of the periodic table is Be, Ca, Sr.


Explanation:

The elements beryllium (Be), calcium (Ca), and strontium (Sr) are all in Group 2 of the periodic table, which is known as the alkaline earth metals group. These elements have similar chemical properties and share certain characteristics. When arranging them in order of atomic number, we have Be (4), Ca (20), and Sr (38). This means that the correct order of these elements from left to right in Group 2 is Be, Ca, Sr.


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