Who introduced the terms ‘Groups’ and ‘Periods’ in the Periodi

1.	Who introduced the terms ‘Groups’ and ‘Periods’ in the Periodic Table first?(a) Dobereiner (b) Newlands(c) Mendeleev (d) Henrychemistry class X
Answer» ANSWER: your answer (C) MENDELEEV not (a),(B) and (d)

Who introduced the terms ‘Groups’ and ‘Periods’ in the Periodic Table first?(a) Dobereiner (b) Newlands(c) Mendeleev (d) Henrychemistry class X

Answer»

your answer (C) MENDELEEV not (a),(B) and (d)