Two radioactive elements Q and S have half-life periods of 10 hours and 20 hours respectively. Therefore Posted on:
Which of the following atoms contains the highest number of electrons in the outermost shell? Posted on:
P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily? Posted on:
Given that the electronic configuration of an element X is 1s22s22p63s 23p4, it can be deduced that X Posted on:
