Single Choice

In any short period the valency of an element with respect to oxygen

AIncreases one by one from $$IA$$ to $$VIIA$$
Correct Answer
BDecreases one by one from $$IA$$ to $$VIIA$$
CIncreases one by one from $$IA$$ to $$IVA$$ and then decreases from $$VA$$ to $$VIIA$$ one by one
DDecreases one by one from $$IA$$ to $$IVA$$ and then Increases from $$VA$$ to $$VIIA$$ one by one

Solution

Correct option is A. Since oxygen is more electronegative element so it will form oxide with elements of group $$IA$$ to $$VII A$$ in their maximum oxidation state. Maximum oxidation state is equal to number of valence electron in outermost shell . Hence it increases by one in any period.

SIMILAR QUESTIONS

Periodic Classification of Elements

The number of valence electrons and the valency with respect to hydrogen are equal for :

Periodic Classification of Elements

Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium and eka-silicon. (a) Name the element which has taken the place of (i) eka-aluminium and (ii) eka-silicon. (b) Mention the period/ periods of these elements in the modern periodic table. (c) Write the group/groups of these elements in the modern periodic table. (d) Classify these elements as metals, non-metals or metalloids. (e) How many valence electrons are present in the atoms of each of these elements?

Periodic Classification of Elements

An element barium has atomic number $$ 56 $$ . Look up its position in the periodic table and answer the following questions : What is its valency ?

Periodic Classification of Elements

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Periodic Classification of Elements

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Periodic Classification of Elements

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Periodic Classification of Elements

The table given above represents the first three periods. Study the table and answer the question as given below : How many electrons are present in the valency of the element with atomic number $$18 $$ ?

Periodic Classification of Elements

An element A has an atomic number $$7$$ and mass number $$14.$$ $$B$$ has electronic configuration $$2,8,8.$$ $$C$$ has $$13$$ electrons, $$14$$ neutrons. $$D$$ has $$18$$ protons and $$22$$ neutrons. $$E$$ has electronic configuration $$2,8,8,1.$$ State valency of each element

Periodic Classification of Elements

Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium and eka-silicon. (a) Name the element which has taken the place of (i) eka-aluminium and (ii) eka-silicon. (b) Mention the period/ periods of these elements in the modern periodic table. (c) Write the group/groups of these elements in the modern periodic table. (d) Classify these elements as metals, non-metals or metalloids. (e) How many valence electrons are present in the atoms of each of these elements?

Periodic Classification of Elements

Which shows maximum valency?

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