• # Charge and the Charge Model

• ### StudentMia

Organizer
August 12, 2021 at 4:46 am

The negative charge of the electron has (within experimental error) exactly the same magnitude as the positive charge of the proton. If one or more electrons are removed from an
atom, what remains is called a positive ion. A negative ion is an atom that has gained one or more electrons. This gain or loss of electrons is called ionization.

When the total number of protons in a macroscopic object equals the total number of electrons, the total charge is zero and the object as a whole is electrically neutral.
To give an object an excess negative charge, we may either add negative charges to a neutral object or remove positive charges from that object. Similarly, we can create
an excess positive charge by either adding a positive charge or removing a negative charge.

Two very important principles should be noted now. First is the algebraic sum of all the electric charges in any closed system is constant (conservation of charge).
The second is that the magnitude of the charge of the electron or proton is a natural unit of charge.

Quick Quiz

As an object acquires a positive charge, its mass usually

1. decreases

2. Increases
3. Remains The Same
4. becomes negative

• ### StudentMia

Organizer
August 12, 2021 at 4:47 am

When an object acquires a positive charge, it loses electrons and its mass decreases. … By an amount equal to the mass of the electrons that have left. When an object acquires a negative charge, it gains electrons, and the mass of the electrons as well.

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