Periodic Table and Periodicity · Chemistry · AP EAPCET

In which of the following oxides of three elements $$X, Y$$ and $$Z$$ are correctly arranged in the increasing order of acidic nature. The electronic ...

Assertion (A) 16 th group elements have higher ionisation enthalpy values than 15 th group elements in the corresponding periods. Reason (R) 15 th gro...

Assertion (A) Fluorine has smaller negative electron gain enthalpy than chlorine. Reason (R) The electron-electron repulsion is higher in chlorine tha...

In which of the following, elements are arranged in the correct order of their electron gain enthalpies?

In second period of the long form of the periodic table an element $$X$$ has second lowest first ionisation enthalpy and element $$Y$$ has second high...

Lithium shows diagonal relationship with element '$$X$$' and aluminium with $$Y . X$$ and $$Y$$ respectively are

The correct order of the metallic character of the elements $$\mathrm{Be}, \mathrm{Al}, \mathrm{Na}, \mathrm{K}$$ is

Which of the following tetrahalides does not exist?

The element with outer electronic configuration $$(n-1) d^2 n s^2$$, where $$n=4$$, would belong to

Choose the correct option regarding the following statements Statement 1 Nitrogen has lesser electron gain enthalpy than oxygen. Statement 2 Oxygen ha...

Among the given configurations, identify the element which does not belong to the same family as the others?

Which statements among the following are correct about helium? (i) Liquid helium is used to sustain powerful superconducting magnets. (ii) Liquid heli...

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements? 1. Nitrogen (N) 2. Phosp...