Question

3. Which of the following statements are
incorrect regarding Mandeleev's periodic
table?
1. Mandeleev considered
compounds
formed by element with oxygen and
hydrogen
2. In the table Ni is placed before Co.
3. Eka-silicon in Mandeleev's periodic table
is gallium
4. The properties of elements are the periodic
function of their atomic masses. (Haryana)​

Answer 1

Answer:

3 is incorrect because ekka silicon is germanium in mendeleevs periodic table...

Answer 2

Answer:

3 is icicti i ho xotdt8 go p