Element O B C N Be Li Atomic radius (pm) 66 88 77 74 111 152 Does this arrangement match with the pattern of the second period of the modern periodic table?

The arrangements match with the second period because all the elements given in this series have two energy shells or orbits present in their atoms.

Element O B C N Be Li Atomic radius (pm) 66 88 77 74 111 152 Which of the above elements have the biggest and the smallest atom?

The lithium is the biggest atom and the oxygen is the smallest atom in the given list. The size of the atom depends upon the distance between the central nucleus to the outermost orbit. In a period from left to right atomic size decreases.

Element K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 152 By referring to the modern periodic table find out the group to which above the elements belong

The elements like potassium, sodium, rubidium, caesium, lithium belongs to the first group of the modern periodic table. All elements in group 1 have 1 valence electron, so they have a valency of + 1 as they will tend to give up 1 electron.

Element K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 152 Arrange the above elements vertically downwards in increasing order of atomic radii.

As we move from top to bottom in the group, the atomic radius will be increased, because the electron enters into a new sub-shell. Elements Atomic radii i) Li 152 ii) Na 186 iii) K 231 iv) Rb 244 v) Cs 262

Element K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 152 Does this arrangement match the pattern of the group 1 of the modern periodic table?

The arrangement of elements in the increasing order of the atomic radius matches the group 1 of the modern periodic table. Elements Atomic radii i) Li 152 ii) Na 186 iii) K 231 iv) Rb 244 v) Cs 262

Element K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 152 Which of the above elements have the biggest and the smallest atom?

The caesium is the biggest atom, and the lithium is the smallest atom. From top to bottom, the atomic radii of an atom will be increased. The atomic radii of caesium is 262 and the atomic radii of lithium is 152 .

What is the periodic trend observed in the variation of atomic radii down a group? Element K Na Rb Cs Li Atomic radius (pm) 231 186 244 262 152

The atomic size of an atom goes on increasing in the group from top to bottom because one shell is added to every next element.

MEDIUM

10th Maharashtra Board

IMPORTANT

Earn 100

Element $O$ $B$ $C$ $N$ $Be$ $Li$

Atomic radius (pm) $66$ $88$ $77$ $74$ $111$ $152$

Arrange the above elements in decreasing order of their atomic radii.

Important Questions on Periodic Classification of Elements

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 3

Element	$O$	$B$	$C$	$N$	$Be$	$Li$
Atomic radius (pm)	$66$	$88$	$77$	$74$	$111$	$152$

Does this arrangement match with the pattern of the second period of the modern periodic table?

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 4

Element	$O$	$B$	$C$	$N$	$Be$	$Li$
Atomic radius (pm)	$66$	$88$	$77$	$74$	$111$	$152$

Which of the above elements have the biggest and the smallest atom?

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 5

Element	$O$	$B$	$C$	$N$	$Be$	$Li$
Atomic radius (pm)	$66$	$88$	$77$	$74$	$111$	$152$

What is the periodic trend observed in the variation of atomic radius while going from left to right within a period?

EASY

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 1

Element	$K$	$Na$	$Rb$	$Cs$	$Li$
Atomic radius (pm)	$231$	$186$	$244$	$262$	$152$

By referring to the modern periodic table find out the group to which above the elements belong

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 2

Element	$K$	$Na$	$Rb$	$Cs$	$Li$
Atomic radius (pm)	$231$	$186$	$244$	$262$	$152$

Arrange the above elements vertically downwards in increasing order of atomic radii.

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 3

Element	$K$	$Na$	$Rb$	$Cs$	$Li$
Atomic radius (pm)	$231$	$186$	$244$	$262$	$152$

Does this arrangement match the pattern of the group $1$ of the modern periodic table?

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 4

Element	$K$	$Na$	$Rb$	$Cs$	$Li$
Atomic radius (pm)	231	186	244	262	152

Which of the above elements have the biggest and the smallest atom?

MEDIUM

10th Maharashtra Board

IMPORTANT

Science and Technology Standard Ten Part - 1>Chapter 2 - Periodic Classification of Elements>Use your brain power>Q 5

What is the periodic trend observed in the variation of atomic radii down a group?

Element	$K$	$Na$	$Rb$	$Cs$	$Li$
Atomic radius (pm)	$231$	$186$	$244$	$262$	$152$

Element O B C N Be Li Atomic radius (pm) 66 88 77 74 111 152 Arrange the above elements in decreasing order of their atomic radii.

Important Questions on Periodic Classification of Elements

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Element $O$ $B$ $C$ $N$ $Be$ $Li$

Atomic radius (pm) $66$ $88$ $77$ $74$ $111$ $152$

Arrange the above elements in decreasing order of their atomic radii.