In the following table, are given eight elements A, B, C, D, E, F, G and H (here letters are not the usual symbols of the elements) of the Modern Periodic Table with the atomic numbers of the elements in parenthesis.
(i) What is the electronic configuration of F?
(ii) What is the number of valence electrons in the atom of F?
(iii) What is the number of shells in the atom of F?
(iv) Write the size of the atoms of E, F, G and H in decreasing order.
(v) State whether F is a metal or a non-metal.
(vi) Out of the three elements B, E and F, which one has the biggest atomic size?
Answers
Answer:
Explanation:
he main characteristics of the last element in the period of the periodic table are inert and stable. It is because the valence orbits of the last elements in the period of the periodic table are entirely filled. The general names of these last elements are known he main characteristics of the last element in the period of the periodic table are inert and stable. It is because the valence orbits of the last elements in the perihe main characteristics of the last element in the period of the periodic table are inert and stable. It is because the valence orbits of the last elements in the period of the periodic table are entirely filled. The general names of these last elements are known as a noble gas or inert elements.od of the periodic table are entirely filled. The general names of these last elements are known as a noble gas or inert elements.as a noble gas or inert elements.
Electronic configuration
Explanation:
(i) Electronic configuration of F(12) is 2, 8, 2.
(ii) There are 2 valence electrons in the atom of F.
(iii) There are 3 shells in the atom of F.
(iv) The atomic size increases as we go from top to bottom of a Group in the periodic table due to the increment in shells. So the size of atoms in the decreasing order is H > G > F > E.
(v) F has 2 valence electrons. To achieve the octet, it will tend to donate 2 electrons. So it is a metal as metals have the tendency to lose electrons.
(vi) The atomic size increases as we go from top to bottom of a Group in the periodic table due to the increment in shells. The atomic size decreases as we go from left to right of a period. So, among the 3 elements given, B has the biggest atomic size.