The electronic configuration of elements A, B and C are [He] 2s1, [Ne] 3s1 and [Ar] 4s1 respectively, which one of the following order is correct for the first ionization potentials (in kJ mol-1) of A , B and C?
A > B > C
C > B > A
B > C > A
C > A > B
The catenation tendency of C, Si and Ge is in the order Ge < Si < C. The bond energies (in kJ mol-1) of C-C, Si-Si and Ge-Ge bonds, respectively are
167, 180, 348
180, 167, 348
348, 167, 180
348, 180, 167
Ionic radius (in Å) of As3+, Sb3+ and Bi3+ follow the order
As3+ > Sb3+ > Bi3+
Sb3+ > Bi3+ > As3+
Bi3+ > As3+ > Sb3+
Bi3+ > Sb3+ > As3+
The energy of an electron present in Bohr's second orbit of hydrogen atom is
-1312 J atom-1
-328 kJ mol-1
-328 J mol-1
-164 kJ mol-1
In the ground state, an element has 13 electrons in M shell. The element is
copper
chromium
nickel
iron
In a nuclide, one a.m.u. of mass is dissipated into energy to bind its nucleons. The energy equivalent of this mass is
931.5 eV
931.5 × 106 eV
931.5 × 106 MeV
931.5 MV
What is X in the following reaction ?
12Mg26 + 1H2 → 12Mg27 + X
γ-ray
0n1
1H1
1D2
C.
1H1
Atomic number of X = 1
Atomic mass of X = 1
So, X is 1H1.
Let electronegativity, ionisation energy and electron affinity be represented as EN, IP and EA respectively. Which one of the following equation is correct according to Mulliken?
EN = IP × EA
EN =
EN = IP - EA