Diamagnetic substance is a substance that has __________ electrons and shows no attraction (slight repulsion) from the external magnetic field.

The essential electronic configuration of  28Ni is __________.

For the 3d series transition elements, the atomic radii show a gradual decrease  from __________.

 The 3d transition series contains elements having an atomic number from __________.

By the autoionisation of water is endothermic, the concentration of hydrogen ions and hydroxide ions __________ with increasing temperature.

Which substance can act as both an acid and a base?

Consider the following equilibrium system:

What is the pH of a buffer solution where [HA] = [A^-]?

Which of the following is true for basic solution?

If egg whites have a hydroxide ion concentration of 3.3 x 10^-7 mol dm^-3, what is the hydrogen ion concentration?