Charges, Atoms, Isotopes

Charges, Atoms, Isotopes

1. Charges.

   • Protons have a positive charge.
   • Electrons have a negative charge.
   • Neutrons have no charge/ they're neutral.
   • Atoms have no overall charge because they have the same amount of protons and electrons. Protons have a positive charge and electrons have a negative charge. Therefore, they cancel each other's charges out.
   • Atoms can lose or gain ions, when they do, they become ions.
     • If an atom loses 1 or more electrons it becomes a positively charged ion.
       • LIMP- Losing It Makes Positive.
     • If an atom gains 1 or more electrons it becomes negatively charged.

2. Isotopes.

   • Atomic number and Mass number.
     • The number of protons in the nucleus of an atom is called its atomic number.
       • The atoms of the same element all have the same number of protons.
       • The atoms of different elements have different numbers of protons.
     • The total number of protons and neutrons in an atoms is called its Mass number.