Question

Which of the following are true for modern periodic table?

(More than one option is correct)

• A. Isobars occupy a single place in the modern periodic table.
• B. Metals are placed on the left side and non-metals are placed on the right side of the modern periodic table.
• C. Elements are placed in increasing order of atomic number.
• D. Isotopes occupy a single place in the modern periodic table.

Answer 1

Answer: (B), (C), (D)

Isotopes occupy a single place in the modern periodic table.

In the modern periodic table given below, we can see that all the elements are arranged in the increasing order of their atomic numbers.

Carbon, for example, has many isotopes, but even so, there is only one place for isotopes of carbon. Hence, isotopes occupy a single place in the modern periodic table.
Also, metals are placed on the left side, non-metals on the right side, and metalloids in between them in a zig-zag manner.