Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
Cl < F < S < O
O < S < F < Cl
S < O< Cl < F
F < Cl < O < S
Amongst the elements with following electronic configuration, which one may have the highest ionisation energy ?
Which one of the following orders is not in accordance with the property stated against it ?
Which of the following order is wrong ?
NH3 < PH3 < AsH3 - acidic
Li < Be < B < C - 1st IP
Al2 O3 < MgO < Na2 O < K2 O - basic
Li+ < Na+ < K+ < Cs+ - ionic radius
Which block consists of elements of groups 13(IIIA),14 (IVA) 15(VA),16(VIA),17(VIIA) and 18 ?
s
p
d
f
The long form of the periodic table is based upon the
atomic number
atomic mass
isotopic mass
molecular weight
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states ?
3d3 ,4s2
3d5 ,4s1
3d5 ,4s2
3d2 ,4s2
The element with the atomic number 118, will be
alkali
noble gas
lanthanide
transition element
Which one of the following arrangements does not truly represent the property indicated against it ?
Br2 < Cl2 < F2 : Oxidising power
The fourteen elements from Ce to Lu are known as
Actinides
Lanthanides
Alkalimetals
Noble gases