why did mendeleev leave blank spaces in his version of the periodic table?\nmendeleevs periodic table…

why did mendeleev leave blank spaces in his version of the periodic table?\nmendeleevs periodic table arranged elements in order of increasing atomic mass; spaces were left for elements not having the correct atomic mass.\nmendeleevs periodic table arranged elements in groups of similar chemical properties; spaces were left for elements not having a similar chemical property.\nmendeleevs periodic table arranged elements in order of increasing atomic mass; it was noticed that chemical properties repeated. mendeleev predicted an element had not been discovered to fit the space.\ndone

why did mendeleev leave blank spaces in his version of the periodic table?\nmendeleevs periodic table arranged elements in order of increasing atomic mass; spaces were left for elements not having the correct atomic mass.\nmendeleevs periodic table arranged elements in groups of similar chemical properties; spaces were left for elements not having a similar chemical property.\nmendeleevs periodic table arranged elements in order of increasing atomic mass; it was noticed that chemical properties repeated. mendeleev predicted an element had not been discovered to fit the space.\ndone

Answer

Brief Explanations:

Mendeleev arranged elements by increasing atomic mass and noticed chemical - property periodicity. He left blanks for undiscovered elements that would fit the pattern.

Answer:

Mendeleev's periodic table arranged elements in order of increasing atomic mass; it was noticed that chemical properties repeated. Mendeleev predicted an element had not been discovered to fit the space.