मानक परिस्थितियों में सभी उत्कृष्ट गैस (Noble gas) के अणु प्रकृति में _________ होते हैं।

The correct order of increasing metallic character of Na, Be, P, Mg and Si is:

Which of the following is the correct order of increasing atomic radii for nitrogen, oxygen, and fluorine?

Which of the following represents the correct increasing order of atomic radii for the elements fluorine (F), oxygen (O), and nitrogen (N)?