Atomic Structure

Atomic Structure

1. A nucleus of an atom is made up of protons and neutrons

2. An atom is neutral because it has an equal number of electrons and neutrons.

   • The positives balance out the negatives.

3. Isotopes

   • Elements with same atomics number different mass numbers are isotopes
   • The different number of neutrons in isotopes can be deduced

4. Arrangement of electrons in atoms