Theory Questions – Periodicity and Periodic Table I

1. (a) Why is a table of elements based on atomic numbers more orderly than a table of elements based on relative atomic masses?

(b) Mendeleev periodic table was arranged in order of their ____________

2. Name four scientists whose work could be associated with the periodic table.

3. (a) Define the periodic law of elements

(b) The atomic number of an element x is 14, and its relative atomic mass is 28. How many electron cells does ‘X’ have?

(i) How many

(ii) Write the electronic configuration of an atom of x

(iii) Will x react in an electrovalentAn electrovalent or ionic bond is formed when a metal atom transfers one or more electrons to a non-metal atom. Ionic or electrovalent compounds are those compounds which are formed by... More or covalent manner? Give reasons for your answer.