1. This presentation is all about
atomic structure

2. The Specification says………..

3. Basic Structure is a small central
nucleus composed of protons and
neutrons
Neutrons
Protons

4. The nucleus is surrounded by
electrons

5. Protons have a positive
charge, electrons have a negative
charge and neutrons have no charge

6. Protons and neutrons are a similar
size. Electrons are much smaller

7. In an atom the number of protons
= the number of electrons

8. The atoms has overall no electrical
charge

9. Atoms may lose or gain electrons to
form ions

10. Isotope of an element

11. Isotopes – atoms have same numbers
of protons but can have a different
number of neutrons

12. The total number of protons in an
atom is called the atomic number

13. The total number of protons and
neutrons is called its mass number