1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the correct statements from the following. (i) In the periodic table, about 78 % of elements are metals. (ii) In a group, the metallic character decreases from top to battom and in a period the nonmetallic character decreases from left to right. (iii) The element Ho belongs to f -block.

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Q. Identify the correct statements from the following.
(i) In the periodic table, about $78 \%$ of elements are metals.
(ii) In a group, the metallic character decreases from top to battom and in a period the nonmetallic character decreases from left to right.
(iii) The element $Ho$ belongs to $f$ -block.

AP EAMCETAP EAMCET 2018

Solution:

In the periodic table, about $78 \%$ of elements are metals.

The element $Ho$ belongs to $f$ - block.

The $f$ -block elements are the lanthanides and actinides and are called inner transition elements.

$^{57} La ,\, Ce ,\, Pr ,\, Nd ,\, Pm ,\, Sm ,\, Eu ,\, Gd ,\, Tb ,\, Dy ,\, Ho ,\, Er$,

$Tm , Yb ^{70}$

${ }^{89} Ac ,\, Th ,\, Pa ,\, U ,\, Np ,\, Pu ,\, Am ,\, Cm ,\, Bk ,\, Cf ,\, Es ,\, Fm,$

$Md,\, No ^{102}$