Substances that cannot be separated  into simpler substances are

The chemical representation of Tungsten is

Who are malleable and ductile?

Which of following does not posses neutron

The atomicity of Ozone

The mass of neutron is of the order of

Two or more atoms of the same element combine to form molecules of

A non - metal which is a good conductor of heat and electricity is

Elements and Compounds are

In an atom , the number of electrons outside the nucleus is equal to the number of