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 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. Based on the above information, answer the following questions: What could the element A be? (i) 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 the 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

Explanation:

The number 6 is easily found by counting across the columns of the periodic table (excluding the transition metals). O appears in the 6th column.) So, the formal charge of O in its elemental form is 2-… meaning that it should be able to donate two electrons, and thus form two bonds.

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