मानक परिस्थितियों में निम्नलिखित में से किस प्राकृतिक रूप से पाए जाने वाले तत्व का घनत्व सबसे अधिक होता है?

The second ionisation energy of which element shows the most anomalously high value among Li, Be, B, and C?

The 'inert pair effect' is best explained by which combination of factors?

Which of the following statements correctly describes the trend and primary reason for the variation in first ionization energy (IE1) from Cr to Mn to Fe in the 3d transition series?