GENERAL KNOWLEDGE

Detailed explanation-1: -Answer and Explanation: FALSE. The periodic table of elements arranges the elements in order of increasing atomic number, which is the number of protons in the nucleus. The atomic mass of each element is based on both the neutrons and protons in the nucleus.

Detailed explanation-2: -The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom). Historically, however, relative atomic masses were used by scientists trying to organise the elements.

Detailed explanation-3: -Elements in the modern periodic table are arranged in increasing order of their atomic numbers, not atomic masses. Elements in the modern periodic table are decorated in increasing order of their atomic numbers, so there is no separate space for isotopes. Hence statements (i), (i) and (ii) are false.

Detailed explanation-4: -Elements, when arranged in order of increasing atomic number Z, lead us to the classification known as the modern periodic table. The chemical and physical properties of the elements recur periodically when the elements are arranged in the order of their atomic numbers.