An electron is a particle that has a negative charge. A proton is a positively charged particle. In the normal state, the atoms of any body have a neutral charge, that is, the number of protons in them is equal to the number of electrons. Thus, if a neutrally charged body has acquired electrons, its charge will be negative.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.