Since, protons and electrons are equal in number, an atom is electrically ___.

A proton and an electron are placed in a uniform electric field.

A sulphur atom contains 16 Protons and 16 neutrons. Calculate its atomic number and atomic mass number.

Number of protons and number of electrons are always equal in _________.

A hydrogen atom contains one proton and one electron. It may be assumed that the electron revolves in a circle of radius 0.53 angstrom (1 angstrom = 10^(-10) m and is abbreviated as A) with the proton at the centre. The hydrogen atom is said to be in the ground state in this case. Find the magnitude of the electric force between the proton and the electron of a hydrogen atom in its ground state.

A hydrogen atom contains one proton and one electron. It may be assumed that the electron revolves in a circle of radius 0.53 angstrom (1 angstrom = 10^(-10) m and is abbreviated as A) with the proton at the center. The hydrogen atom is said to be in the ground state in this case. Find the speed of the electron in the ground state of hydrogen atom.