Question

introduction about piriodic classification of element​

Answer 1

Answer:

Introduction. There are about 115 elements have been known to us till today. Based on their properties, all the elements are arranged in order, known as periodic table. ... Newlands started with the element having the lowest atomic mass (such as hydrogen) and ended at thorium, which was the 56th element (at his time).

Answer 2

Answer:

Introduction. There are about 115 elements have been known to us till today. Based on their properties, all the elements are arranged in order, known as periodic table. ... Newlands started with the element having the lowest atomic mass (such as hydrogen) and ended at thorium, which was the 56th element (at his time).