Where in period $$3$$ of the modern periodic table do we find element forming negative ions?
The positions of three elements $$A, B$$ and $$C$$ in the periodic table are indicated below: Group $$16$$ Group $$17$$ - - (First Period) - $$A$$ (Second Period) - - (Third Period) $$B$$ $$C$$ (Fourth Period) Which is the more active element, $$A$$ or $$C$$? Why ?
The most electronegative element from the following elements is :
Arrange the following according to the instructions given in brackets : $$Li, K, Na, H$$ (In the decreasing order of their ionization potential)
Arrange the following according to the instructions given in brackets : $$F, B, N, O$$ (In the increasing order of electron affinity)
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. (i) Which element forms electrovalent compound with $$G$$? (ii) The ion of which element will migrate towards the cathode during electrolysis? (iii) Which non-metallic element has the valency of 2? (iv) Which is an inert gas?