science

Mendeleev classified the elements according to their.....................

• Atomic number

• Atomic mass

• All the previous

Mendeleev classified only.....................Elements.

• 76

• 65

• 67

The vertical columns in the Mendeleev's periodic table are called...................

• Rows

• Periods

• Groups

The horizontal rows in the Mendeleev's periodic table are called........................

• Rows

• Periods

• Groups

The first attempt to classify the elements done by scientist...........................

• Mendeleev

• Mosley

• Rutherford

• Bohr