Atoms of eight elements A, B, C. D. E. EG and H have the same number of electron shells but different number of electrons in their outermost shells. It was found that elements A and G combine and B are basic in nature while those of E and F are acidic. The oxide of element D is almost (c) Which one of the eight elements would have the largest atomic radius?
to form an ionic compound which can also be extracted from sea water, Oxides of the elements A
neutral. Answer the following questions based on the information given here in
(a) To which group or period of the periodic table do the listed elements belong?
(b) Which one of the eight elements is likely to be a noble gas?
(c) Which one of the eight elements would have the largest atomic radius?
(d)Which two elements amongst these are likely to be non-metals?
(e) Which one of these eight elements is likely to be a semi-metal or a metalloid?
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Answer:
Explanation:
⇒ Number of given elements are 8. They are A,B,C,D,E,F,G and H.
⇒ All 8 elements are belongs to same period because they have same number of electronic shells and have different number of electrons in the outermost shell.
⇒ We can see the above pattern in 3
rd
period as it have 8 elements.
⇒ Nature of compound formed by a combination of element B and F is ionic in nature since B is metal and F is non-metal.
⇒ Here ⇒ A=Na (Sodium), B=Mg (Magnesium),
C=Al (aluminium), D=Si (Silicon),
E=P (Phosphorus), F=S (Sulphur),
G=Cl (Chlorine), H=Ar (Argon).
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