Assertion: In a period left to right metallic character increases Reason : In a period left to right electronegativity decreasesA Both Assertion & Reason are true and the reason is the correct explanation of the assertion B Both Assertion & Reason are true but the reason is not the correct explanation of the assertion C Assertion is true statement but Reason is false D Both Assertion and Reason are false statements
Question
Assertion: In a period left to right metallic character increases Reason : In a period left to right electronegativity decreasesA Both Assertion & Reason are true and the reason is the correct explanation of the assertion B Both Assertion & Reason are true but the reason is not the correct explanation of the assertion C Assertion is true statement but Reason is false D Both Assertion and Reason are false statements
Solution
The correct answer is D. Both Assertion and Reason are false statements.
In a period from left to right, the metallic character actually decreases, not increases. This is because elements on the left of the periodic table are metals and those on the right are non-metals. As we move from left to right, the number of valence electrons increases which makes the elements less likely to lose electrons and behave as metals.
Also, the electronegativity increases from left to right across a period, not decreases. Electronegativity is the ability of an atom to attract shared electrons in a chemical bond. As we move from left to right across a period, the number of charges on the nucleus increases which tends to draw the electrons closer to the nucleus and increases the electronegativity.
Similar Questions
Assertion: In a period left to right metallic character increases Reason : In a period left to right electronegativity decreasesA Both Assertion & Reason are true and the reason is the correct explanation of the assertion B Both Assertion & Reason are true but the reason is not the correct explanation of the assertion C Assertion is true statement but Reason is false D Both Assertion and Reason are false statements
In the periodic table, the metallic character of elementsOnly one correct answerA.Decreases from left to right across a period and on descending a groupB.Decreases from left to right across a period and increases on descending a groupC.Increases from left to right across a period and on descending a groupD.Increases from left to right across a period and decreases on descending a group
Which statement describes a periodic trend of electronegativity?A.Electronegativity increases from left to right across a period.B.Electronegativity increases from top to bottom of a group.C.Electronegativity remains the same within a period.D.Electronegativity increases from right to left across a period.SUBMITarrow_backPREVIOUS
On moving across a period from left to right, the non-metallic characterIncreasesDecreasesFirst increases then decreasesRemains constant
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right? ans. The atoms lose their electrons more easily There is an increase in the number of valence electrons The oxides become more acidic The elements become less metallic
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