CSIR UGC NET GATE Chemical periodicity Quiz.

The periodic table is arranged according to periodic properties in terms of ionization energy, electronegativity, atomic radius, electron affinity, and metallic character. The periodic table arranges the elements by periodic properties, which are recurring trends in physical and chemical characteristics.

CSIR UGC NET GATE QUESTION’S PRACTICE MAKES YOU ABLE TO SOLVE QUESTIONS IN LESS TIME BECAUSE OF CBT TESTS ARE SAME TO THIS .

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12-Crown-4 binds with the alkali metal ions in the following order:Li+>> Na+> K+> Cs+ .It is due to the

 
 
 
 

The electronegativity differences is the highest for the pair

 

 
 
 
 

The least basic among the following is:

 
 
 
 

For an odd nucleon in ‘g’ nuclear orbital and parallel to I, spin and parity are

 
 
 
 

The size of the d orbitals in Si, P, S and Cl follows the order.

 
 
 
 

Among F, Na+, O2-and Mg2+ions, those having the highest and the lowest ionic radii respectively are

 
 
 
 

Question 1 of 6

Atomic Radius

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom. All that we can measure is the distance between two nuclei (internuclear distance). A covalent radius is one-half the distance between the nuclei of two identical atoms. An ionic radius is one-half the distance between the nuclei of two ions in an ionic bond. The distance must be apportioned for the smaller cation and larger anion. A metallic radius is one-half the distance between the nuclei of two adjacent atoms in a crystalline structure. The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii. The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 10-9 m; 1 pm = 1 X 10-12 m

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