In a group I of the periodic table, three elements $X, Y, a n d Z$ have ionic radii 1.33 $A^{0}$ , 0.95 $A^{0}$ , and 0.60 $A^{0}$ respectively. Giving a reason, arrange them in the order of increasing atomic numbers in the group.

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Solution

The ionic radii of the elements are given $X = 1.33 A^{0}, Y = 0.95 A^{0}, a n d Z = 0.60 A^{0}$

As the ionic radius increases, the atomic size increases. The number of electrons also increases, and thus, the atomic number increases.

Therefore, the increasing order of atomic
numbers of the elements is $Z < Y < X$ ..

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Q. (a) Explain why:
(i) All the elements of a group have similar chemical properties.
(ii) All the elements of a period have different chemical properties.

(b) The atomic radii of three elements X, Y and Z of a period of the periodic table are 186 pm; 104 pm and 143 pm respectively. Giving a reason, arrange these elements in the increasing order of atomic numbers in the period.

The three elements X, Y and Z in a group have ionic radii $1.33 Α, 0.95 A a n d 0.60 A$ , respectively. Arrange them in increasing order of atomic numbers.

In group $I$ of the periodic table, three elements $X, Y$ and $Z$ have ionic radii I $33$ pm, $95$ pm, $60$ pm respectively. Giving a reason, arrange these elements in the order of increasing atomic number in the group.

Elements X, Y and Z belongs to IA group of the periodic table their atomic radii are as follows:

X⇢1.33 A, Y⇢0.95 A, Z⇢0.60 A

Arrange the elements in the increasing order of atomic numbers by giving reasons.

In group 1 of the periodic table three elements X, Y and Z have atomic radii 133 pm, 95 pm and 65 pm respectively. Giving a reason, arrange them in the order of increasing atomic numbers in the group.

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Anionic Radius

Standard X Chemistry

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In a group I of the periodic table, three elements X,Y, and Z have ionic radii 1.33 A0 , 0.95 A0, and 0.60 A0 respectively. Giving a reason, arrange them in the order of increasing atomic numbers in the group.

The ionic radii of the elements are given X=1.33 A0, Y=0.95 A0, and Z=0.60A0 As the ionic radius increases, the atomic size increases. The number of electrons also increases, and thus, the atomic number increases. Therefore, the increasing order of atomic numbers of the elements is Z<Y<X..

In a group I of the periodic table, three elements $X, Y, a n d Z$ have ionic radii 1.33 $A^{0}$ , 0.95 $A^{0}$ , and 0.60 $A^{0}$ respectively. Giving a reason, arrange them in the order of increasing atomic numbers in the group.