Question

मेंडलीफ आवर्त सारणी को किन्ही दो दोष दीजिए, जिन्हें आधुनिक आवर्त सारणी से दूर किया गया।

Answer 1

• In Mendeleev periodic table ,Elements are arranged in increasing order of atomic masses , but in modern periodic table

Elements are arranged in increasing order of atomic number .

• In Mendeleev periodic table the position of hydrogen is the main demerit which solve in modern periodic table .....