Maximum & minimum e-gain enthalpy in chalcogen family are respectively -
(A) O, Se
(B) Te, S
(C) S, O
(D) S, Te

The electron gain enthalpy (in kJ/mole) of F, O, N and C respectively are :

S has more negative electron gain enthalpy than O why ?

Among the given elements, which element has highest electronegativity? Se, S ,Te, O

The order of electron gain enthalpy (magnitude) of O, S and Se is:

The minimum value of (sintheta+c o s e ctheta)^2+(costheta+sectheta)^2=

Set of elements known as chalcogens is : 1) O, S, Se, 2) CI, Br, I 3) N, P, S 4) C, Si, Ge

Why is the electron gain enthalpy of O or F less than that of S or Cl?

In the arrangement shown in Fig., slits S_(1) and S_(4) are having a variable separation Z. Point O on the screen is at the common perpendicular bisector of S_(1) S_(2) and S_(3) S_(4) . If a hole is made at O' on AO' O and the slit S_(4) is closed, then the ratio of the maximum to minimum observed on screen at O , if O' S_(3) is equal to (lambda D)/(4d) , is

The increasing order of electron affinity values of O,S and Se is

Find the principal value of "c o s e c"^(-1)(-2) .