Find the number of non metals in above graph, except noble gas. If A,B,C,E,F,G and H are 2nd period-elements.

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but different in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of elements D is almost neutral. Answer the following questions based on the information given here in : (i) To which group or period of the periodic table do the listed elements belong ? (ii) Which one of the eight elements is likely to be a noble gas? (iii) Which one of the eight elements would have the largest atomic radius ? (iv) Which two elements amongst these are likely to be the non-metals? (v) Which one of these eight elements is likely to be a semi-metal or metalloid ?

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but are different number of electrons in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of elements D is almost neutral. Which two elements amongst these are likely to be the non-metals ?

Atoms of eight elements A, B, C, D, E, F, G and H have the same number of electronic shells but are different in their outermost shells. It was found that elements A and G combine to form an ionic compound which can also be extracted from sea water. Oxides of the elements A and B are basic in nature while those of E and F are acidic. The oxide of elements D is almost neutral. Which one of the following elements is likely to be a noble gas?

The following table shows the position of six elements A,B,C,D,E and F in the periodic table Using the above table , answer the following questions: Which element is a non-metal with valency 3?

Where a, b,c, d, e,f,g, h ar 3^(rd) period elements. If difference between atomic number of elements b and e is x and difference between atomic number of elements c and f is y . What is the value of x-y .

Where a, b,c, d, e,f,g, h ar 3^(rd) period elements. If difference between atomic number of elements b and e is x and difference between atomic number of elements c and f is y . What is the value of x-y .