Question

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 shell. The element 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 oxides of remaining six elements are basic in nature. Based on the above information answer the following questions
i) What could 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
number

Answer 1

Answer:

(i) Hydrogen

(ii) Same Group

(iii) H2O

(vi) A element

Answer 2

1. hydrogen
2. same group
3. H2O
4. I have a attached picture for this question.
5. 1:4
6. A

Hope it's helpful.