MEDIUM
Earn 100
Write with an example what is meant by periodic property of an element? Mention a property which is not periodic?
Important Questions on Classification of Elements and Periodicity in Properties
EASY
The acidic oxide from below is:
MEDIUM
The first ionization energy of magnesium is smaller, as compared to that of elements and , but higher than that of . The elements and , respectively, are :
MEDIUM
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved ?
MEDIUM
Given below are the oxides :
and Number of amphoteric oxides is :
MEDIUM
The acidic, basic and amphoteric oxides, respectively, are
EASY
Maximum co-valency of phosphorus can be
MEDIUM
The general formula of the compounds formed when group elements (A) reacts with group elements (B) is
MEDIUM
The ionic radii of and are respectively:
MEDIUM
Three elements and are in the period of the periodic table. The oxides of and , respectively, are basic, amphoteric and acidic. The correct order of the atomic numbers of and is:
EASY
Which among the following oxides is the most basic?
EASY
The correct decreasing order for metallic character is
HARD
The option(s) with only amphoteric oxides is(are):
MEDIUM
The correct order of decreasing acidic nature of oxides
EASY
Discuss Abnormals behaviour of Nitrogen.
EASY
Total number of acidic oxides among and is _____ .
HARD
Among the following, the correct order of acidity is:
MEDIUM
In which of the following options the order of arrangement does not agree with the variation of property indicated against it?
EASY
and show similarities in properties due to the diagonal relationship except in the property given below. What is ?
HARD
has a smaller first ionization enthalpy than . Consider the following statement:
(I) it is easier to remove electron than electron
(II) electron of is more shielded from the nucleus by the inner core of electrons than the electrons of
(III) electron has more penetration power than electron
(IV) atomic radius of is more than
(atomic number )
The correct statements are.
MEDIUM
In the following sets of reactants which two sets best exhibit the amphoteric character of Al2O3 . xH2O ?
