Elect the correct answer. the elements beryllium, calcium, and strontium are all in group 2. what is the correct relationship of these elements regarding their ionization energy? a. ca < be < sr b. sr < be < ca c. be < ca < sr d. sr < ca < be e. ca < sr < be

D. Sr < Ca < Be  

Step-by-step explanation:

Ionization energy decreases from top to bottom within a Group, because the valence electrons are further from the nucleus and therefore easier to remove.

Thus, Sr has the lowest ionization energy and Be the highest.

The correct order is Sr < Ca < Be.

b.final

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