Question

In the periodic table, metallic elements appear:
(A) In the left-hand columns
(B) In the top rows
(C)In the right-hand column
(D) In the bottom row

Answer 1

Periodic made the study of elements and their properties easy. Periodic table made the study of the chemistry of elements. The elements in the modern periodic table are arranged on the basis of atomic number.

Complete step by step solution:
The periodic table was discovered by Dmitri Mendeleev in 1869. The periodic table contains 118 elements. Mendeleev law states that "The properties of the elements are the periodic function of their atomic number", so elements in the periodic table are arranged on the basis of atomic number. There are 18 groups and 7 periods. Periodic made the study of elements and their properties easy. The factor that made it easy to study properties of the elements down the group, the properties of elements follow a trend. Same goes to elements of a particular period.
Group 1 to group 16 are metals, but in group 16 there is a small deviation in the trend of the metallic character of elements. Group 1 to 16 is placed on the left side of the periodic table.
Option A is "In the left-hand columns". From the above discussions, we can conclude that option A is the correct option.
Option B is "In the top rows". Top row means period 1 and 2. Period 1 and 2 consists of both metals and nonmetals. Let me explain period 1 in detail, there are two elements hydrogen and helium. Hydrogen is a metal and is placed in the left-hand side, whereas helium is a nonmetal and placed in group 18. This also points to the fact that metals are placed in the left-hand side of the periodic table.
Option C is "In the right-hand column". Nonmetals are placed on the right side of the periodic table. Thus, option C is the wrong option.
Option D is "In the bottom row". Lanthanides and actinides are placed in the bottom of the periodic table which is also called inner transition metals.

Thus, option (A) is the correct answer.

Note: Across the period the metallic character decreases from left to right, so the metals are arranged in the left-hand columns. Therefore option A is the correct answer. Metals are of s-block and inner transition metals are of f-block elements.