Home
Class 11
CHEMISTRY
Assertion: Metallic character increases ...

Assertion: Metallic character increases from left to right among the elements of 2nd period.
Reason: Second period is called shortest period.

A

Both A and B true and R is the correct explanation A

B

Both A and R are true but R is not a correct explanation of A

C

A is true but R is false

D

Both A and R are false

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step 1: Analyze the Assertion The assertion states that "Metallic character increases from left to right among the elements of the 2nd period." - In the periodic table, as we move from left to right across a period, the metallic character of the elements generally decreases. This is because elements on the left side (like lithium and beryllium) are metals, while those on the right side (like fluorine and neon) are non-metals. Therefore, the assertion is **false**. ### Step 2: Analyze the Reason The reason states that "Second period is called the shortest period." - The second period consists of 8 elements: lithium (Li), beryllium (Be), boron (B), carbon (C), nitrogen (N), oxygen (O), fluorine (F), and neon (Ne). The first period, which contains only hydrogen (H) and helium (He), is indeed the shortest period. Therefore, the reason is also **false**. ### Step 3: Conclusion Since both the assertion and the reason are false, the correct answer is that both statements are incorrect. ### Final Answer Both the assertion and reason are false. ---
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion:Metallic character is highest at the extremely left side of the periodic table. Reason:Ionization enthalpy increases across a period.

Ionisation potential increases in a period from left to right because

Arrange the elements of period 3 in decreasing metallic character.

Give reason - The oxidising power of elements increases from left to right along a period.

How does number of valency vary on moving from left to right In the second period of a periodic table

How does number of Valence electrons on moving from left to right In the second period of a periodic table

Number of elements present in the shortest period.

Metals have few electrons in their valence shell while non-metals generally have more electrons in their valence shell. Metallic character is closely related to atomic radius and ionisation enthalpy. Metallic character increases from top to bottom in a group and decreases from let to right in a period of periodic table. metallic character is inversely related to electronegativity of element. Q. The electronegativity of the following elements increase in the order:

How does the metallic and non-metalic character vary on moving from left to right in a period?

(a) Electropositive nature of the element(s) increases down the group and decreases across the period (b) Electronegativity of the element decreases down the group and increases across the period (c) Atomic size increase down the group and decreases across a period (left to right) (d) Metallic character increases down the group and decreases across a period On the basis of the above trends of the periodic table, answer the following about the electron with atomic number 3 to 9 (a) Name the most electropositive element among them (b) Name the most electronegative element (c) Name of the element with smallest atomic size (d) Name the element which is a metalloid (e) Name the element which shows maximum valency.