GENERAL KNOWLEDGE

Detailed explanation-1: -An electron is a subatomic particle that is negatively charged. As opposite charges attract, negatively charged electrons are drawn to positively charged protons. Electrons are referred to as negative because of their behavior in an electric field.

Detailed explanation-2: -Electrons have an electric charge of −1 and their mass is approximately about 1/2000 the mass of a neutron or proton. Electron charge is usually denoted by the symbol e. It is a fundamental physical constant that is used to express the naturally occurring unit of electric charge which is = 1.602 × 10-19 coulomb.

Detailed explanation-3: -Ions with a positive charge are called cations. Ions with a negative charge are called anions.

Detailed explanation-4: -J.J. Thomson’s discovery of the negatively charged electron had raised theoretical problems for physicists as early as 1897, because atoms as a whole are electrically neutral.

Detailed explanation-5: -The energy is negative due to the attractive nature of the Coulombic interaction. This is alternatively visualized as an atom whose electron has been moved infinitely far away. The potential energy of the electron is defined as zero as there is no interaction at infinite distance.