Question

In Mendeleev's PeriodicTable, gaps were
left for the elements to be dis coverd later. which of the following elements found a place in the Periodic. Table later ( )
a. Chlorine
b. Silicon
c. Oxygen
d. Germanium
PLZ SAY ONLY CORRECT OPTION PLZ SAY FAST URGENT


Mendeleeffs Periodic table is based on ( )
a. Atomic number
b. Atomic mass
c. Protons
d. Electrons
PLZ SAY ONLY CORRECT OPTION PLZ SAY FAST URGENT ​

Answer 1

Answer:

Mendeleev Periodic table is based on b. Atomic mass

the first questions correct answer is d. Germanium

Explanation:

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Answer 2

Germanium was discovered later.

Extra point : Gallium and Scandium were also discovered later.

Medeleev's Periodic table was based on Atomic mass.