Question

State Mendeleev's Periodic Law.
Why did Mendeleev leave some gaps in the Periodic table?
the letter 'R' was used to represent any of the elements in the
group, then the hydride and oxide of carbon would respectively be
represented as
(1) RH, RO
sa RH,, ROZ
ii) RH,, RO
iv) RH₂, RO
Isotopes are
man nf nn olamant with similar chemical properties​

Answer 1

Answer:

Mendeleev's periodic law is stated as properties of elements are the periodic function of their atomic masses.

Mendeleev left gaps in his periodic table because he had predicted the discovery of new elements

Next answer is RH4 and RO2

since it is CH4 and CO2.

Hope it helps you:)

Answer 2

-Mendeleev's Periodic Law states that the properties of the elements are a periodic function of their atomic weights.

-In other words, the chemical and physical properties of the elements repeats periodically when the elements are arranged in the order of their atomic weights.

-Mendeleev left some gaps in the periodic table made by him because he believed that in the coming times more elements will be discovered.

-He predicted the existence of some elements and named them by prefixing Eka, for example:

Scandium --- Eka-boron

Gallium -- Eka - aluminum

Germanium --- Eka-silicon

- The hydride of carbon will be represented by RH₄ (i.e., CH₄) and the oxide of carbon will be represented by RO₂ (i.e., CO₂).