Which of the follownig elements, is most electronegative ?
F
O
Ne
Na
A.
F
Fluorine is the most electronegative element of the periodic table. Its electronegativity is 4.0.
How does the ionisation energy of 1st group elements vary ?
Increases down the group
Decreases down the group
Remains unchanged
Variation is not regular
The compound insoluble in water is
mercurous nitrate
mercuric nitrate
mercurous chloride
mercurous perchlorate.
Dominance of strong repulsive forces among the molecules of the gas (Z = compressibility factor)
depends on Z and indicated by Z = 1
depends on Z and indicated by Z > 1
depends on Z and indicated by Z < 1
is independent of Z.