Periodic Classi...

According to the periodic law, when the elements are arranged in the _______________ order of their ________________, their properties show periodicity.

Arrange Br, Br⁺ and Br^- in the increasing order of volumes.

In the modern periodic table, the elements of a group have similar properties because they have the same.

Name the element with the least ionization potential from the elements of periods 1, 2, and 3.

The hydroxide of the element belonging to period 3 and group 13 will be:

Arrange the elements Cl, Al, Na and S in the decreasing order of their ionisation potential.

In the same period or group, there is a gradation in a particular property because:

Newland's relation is called:

An element 'X' is a silver-gray solid with a density of 0.86 g/cm³ and melting point of 63^oC. The element exhibits vigorous reaction with cold water. In which group is the element likely to be found in the periodic table?

Elements with stable configuration, e.g. neon, have an electron affinity value of:

The electronegativity values of three elements 'X', 'Y' and 'Z' are 0.93, 2.6 and 3.2, respectively. The chemical bond formed between the atoms of 'X' and 'Z' will be ___________ and the chemical bond formed between 'Y' and 'Z' will be __________.

Atomic numbers of four elements A, B, C and D are 14, 17, 18 and 19 respectively. Which of these is highly non-metallic?

An element 'A' is in group 2 of period 2 and another element 'B' is in the same group but in period 3. The proton number of 'A' is:

Arrange the elements O, B, N, and F in the increasing order of their atomic sizes.