What type of electric charge does an electron possess?

If $1 \text{ ampere}$ electric current passes through a conductor,how many electrons will pass per second?

An electron in a metal is free to move anywhere but cannot leave the metal.

In an electric circuit,state the relationship between the direction of conventional current and the direction of flow of electrons.

An electric iron draws a current of $0.5\, A$ when the voltage is $200\, V$. Calculate the amount of electric charge flowing through it in one hour. (in $C$)

What is the magnitude of the electric charge on an electron?