Question

1. Atoms of seven elements A,B,C,D,E,F and G have a different number of electronic shells but have the same number of electrons in their outermost shells. The elements A and C Combine with chlorine to form an acid and common salt respectively. The oxide of element A is liquid at room temperature and is a neutral substance while the oxides of the remaining six elements are basic in nature. Based on the above information answer the following questions:

i)What could the element A be?

ii)Will elements A to G belong to the same period or same group of the periodic table?

iii)Write the formula of the compound formed by the reaction of the element A with oxygen.

iv) Show the formation of the compound by a combination of element C with chlorine with the help of electronic structure.

v)What would be the ratio of number of combining atoms in a compound formed by the combination of element A with Carbon?
vi) Which one of the given elements is likely to have the smallest atomic radius?

Answer 1

i) hydrogen
ii) same group
iii) H2O
iv) I have attached a picture for this answer.
v) 1:4
vi) A