Electric charge is the physical property of matter that causes it to experience a force when close to other electrically charged matter. There are two types of electric charges, called positive and negative. Positively charged substances are repelled from other positively charged substances, but attracted to negatively charged substances; negatively charged substances are repelled from negative and attracted to positive. An object will be negatively charged if it has an excess of electrons, and will otherwise be positively charged or uncharged. The SI unit of electric charge is the coulomb (C)

Thus, 1 coulomb (C) is empirically (experimentally) defined as the amount of charge that passes a given point when 1 ampere of current (as defined by the SI) passes through that point in 1 second. Fundamental Units of charge (Sort of) Charge of a proton = 1.602 x 10^-19 C

Number of electrons that make up   1 Coulomb = 16020000000000000000

or what really happens how many electrons do you have to be removed

Lost electrons that make up 1 coulomb = 16020000000000000000

Charge of an Electron = - 1.602 x 10^-19 C

Number of electrons that make up   -1 Coulomb = 16020000000000000000