(C) In the periodic table,atomic size decreases from left to right across a period and increases from top to bottom down a group. $Li$ and $Be$ belong

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(C) In the periodic table,atomic size decreases from left to right across a period and increases from top to bottom down a group. $Li$ and $Be$ belong to period $2$,while $Na$ and $Mg$ belong to period $3$. Among $Li$ and $Be$,$Be$ is to the right,so it is smaller. Thus,$Be$ has the smallest atomic size.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Atomic and Ionic radii

Easy

Which of the following atoms has the smallest atomic size?

A
$Mg$
B
$Na$
C
$Be$
D
$Li$

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Classification of Elements and Periodicity in Properties

Subtopic

Atomic and Ionic radii

Which of the following has the smallest size?

Easy

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Explain why cations are smaller and anions larger in radii than their parent atoms.

Medium

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In which of the following pairs is the difference between the covalent radii of the two metals maximum?

Easy

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Which of the following orders of atomic/ionic radii is $NOT$ correct?

Medium

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Describe the theory associated with the radius of an atom as it:
$(a)$ gains an electron
$(b)$ loses an electron

Medium

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Which of the following atoms has the smallest atomic size?

Similar Questions

Which of the following has the smallest size?

Explain why cations are smaller and anions larger in radii than their parent atoms.

In which of the following pairs is the difference between the covalent radii of the two metals maximum?

Which of the following orders of atomic/ionic radii is $NOT$ correct?

Describe the theory associated with the radius of an atom as it:$(a)$ gains an electron$(b)$ loses an electron

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Describe the theory associated with the radius of an atom as it:
$(a)$ gains an electron
$(b)$ loses an electron