1. The Atom

2. The Atom
The smallest particle of an element that can be divided and still be the same substance.

3. Inside Left
Proton (+)-
1. Charge- Positive
2. Mass- 1 AMU (Atomic Mass Unit- SI unit for measuring the mass of atomic particles)

4. 3. Location- nucleus
4. Atomic #= # of protons of an atom

5. 5. All atoms of an element have the same number of protons.

6. Inside Center
Neutron (o)
1. Charge- No charge or neutral
2. Mass- 1 AMU

7. 3. Location- nucleus
4. Mass #= number of protons and neutrons.

8. 5. Neutrons= atomic number (p) - mass number (p+n)

9. Nucleus- most of the mass of the atom found here.

10. Mass of proton + mass of the neutron
Nucleus continued:
Mass of proton + mass of the neutron

11. Inside Right
Electron (-)
1. Charge- negative
2. Mass- almost zero

12. 3. Location- electron cloud outside nucleus.
E= 1 P

13. 5. Positive ions-
# of P (+) is greater than # of E (-).
Negative ions -
# of E (-) > P (+)

14. 6. Isotopes- atoms have different # of neutrons. # of P the same.