The radiation can ionise gases

It causes ZnS to fluorescence

Deflected by electric and magnetic fields

Have wavelengths shorter than ultraviolet rays

The properties of elements are the periodic functions of their atomic numbers

Non-metallic elements are lesser in number than metallic elements

The first ionisation energies of elements along a period do not vary in a regular manner with increase in atomic number

For transition elements the d-subshells are filled with electrons monotonically with increase in atomic number.

2

4

3

1

low bond energy

absence of bond polarity

unsymmetrical electron distribution

presence of more number of electrons in bonding orbitals