Classification ...

Which of the following sets of elements has strongest tendency to form anions ?

Which amongst the following is not an alkaline earth metal?

The electron affinities of which group of elements are positive?

Electronic configuration of vanadium is:

A particular atom has the 4th shell as its valence shell. If the difference between the number of electrons between K and N shell and L and M shell is zero, find the electronic configuration of its stable ion.

From the set of elements given below, identify the correct order of electron affinities of the elements.
(a) $$Be > Mg > Ca > Sr > Ba$$
(b) $$F > Cl > Br > I$$
(c) $$Be > B > C > N > O$$
(d) $$Cl > F > Br > I$$

Element $$A$$ has electronic configuration 2,7. $$B$$ has configuration 2,8,6. $$C$$ has configuration 2,8 while $$D$$ has 2,8,7. Which element will show similar chemical properties?

The electronic configuration of the element with Atomic number 19 is___________.

The atomic number of an element 'y' is 20. The electronic configuration of the ion having inert gas configuration is:

The element with electronic configuration 2, 8,6 is: