Chemistry
Name the element which has :
(i) Two shells, both of which are completely filled with electrons ?
(ii) The electronic configuration 2, 8, 3 ?
(iii) A total of three shells with five electrons in its valence shell ?
(iv) A total of four shells with two electrons in its valence shell ?
(v) Twice as many electrons in its second shell as in its first shell ?
Related Questions
The metals of group 2 from top to bottom are Be, Mg, Ca, Sr, and Ba
(i) Which one of these elements will form ions most readily and why ?
(ii) State the common feature in their electronic configuration.
An element Barium has atomic number 56. Look up its position in the Periodic Table and answer the following questions.
(i) Is it a metal or a non-metal ?
(ii) Is it more or less reactive than calcium ?
(iii) What is its valency ?
(iv) What will be the formula of its phosphate ?
(v) Is it larger or smaller than caesium (Cs) in size ?
In group I of the Periodic Table, three elements X, Y and Z have ionic radii 1.33 Å, 0.95 Å and 0.60 Å respectively. Giving a reason, arrange them in the order of increasing atomic numbers in the group.