1. Atoms, Elements, Compounds, and Ions
basic building block of all matter
Element
Substance that consists of only one type of atom.
Molecule has two different atoms.
Compound
substance that consists of more than one type of
element.
Ion
substance that has a positive or negative charge

2. Atoms Atoms have: A nucleus small, heavy part of the atom
An electron cloud
large, lightweight part of the atom
Nucleus
Electron Cloud

3. Nucleus of an Atom Nucleus contains: Protons Have a positive charge N
All atoms are distinguished by
the number of protons it
has (atomic number) N N
Neutrons
Notice that protons and neutrons are same size, because have same mass.
Have no charge
Have same mass as protons

4. Electron Cloud of an Atom
An electron cloud contains:
Electrons e-
have a negative charge
are contained within shells of the electron cloud
orbit the nucleus of the atom
have a very small mass compared to protons and neutrons
determine bonding properties of substance

5. Atom Structure
Neutron -1
Electron
Proton +1 +1 -1

6. Elements contain one or more of the same type of atom!
Examples include:
Hydrogen – 1 proton per atom
Carbon – 6 protons per atom
Oxygen – 8 protons per atom
Copper – 29 protons per atom
Gold – 79 protons per atom

7. Compounds contain more than one type of atom!
Example of organic compound (a compound with carbon atoms):
Carbon Dioxide – CO2 (1 atom of carbon and two atoms of oxygen)
Example of inorganic compound (a compound with no carbon atoms):
Water – H2O (2 atoms of hydrogen and one atom of oxygen)

8. - +
IONS
An ion is an atom or group of atoms with a positive or negative charge!!
A particle with a neutral charge has the same number of
protons and electrons.
An ion does not have the same number of electrons and protons.
Examples of ions:
He A helium atom that is missing one electron.
The atom has one more proton than electron,
and must have a positive charge.
CO32- - Carbonate has two more electrons than protons

9. Lets take a look deep inside
Andy the Hydrogen Atom
Lets take a look deep inside

10. Lets take a look deep inside
Andy the Hydrogen Atom
Lets take a look deep inside

11. Lets take a look deep inside
Andy the Hydrogen Atom
Lets take a look deep inside

12. Lets take a look deep inside
Andy the Hydrogen Atom
Lets take a look deep inside

17. This is a Proton.
Positive Charge weighs ONE
Tells what type of atom it is

18. This is a Proton.
Positive Charge weighs ONE
Tells what type of atom it is

19. This is a Proton.
Positive Charge weighs ONE
Tells what type of atom it is

20. This is a Proton.
Positive Charge weighs ONE
Tells what type of atom it is
This is a Neutron No Charge, Weighs One

21. This is an Electron No Weight Negative charge
This is a Proton.
Positive Charge weighs ONE
Tells what type of atom it is
This is a Neutron No Charge, Weighs ONE

22. Element Guide

23. Element Guide 2

24. Element Guide 2

25. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2

26. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2 He

27. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2 He

28. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2
Explains name of the element. He

29. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2
Explains name of the element. He 4

30. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2
Explains name of the element. He 4

31. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2
Explains name of the element. He 4
Explains the total atomic weight-The number of protons PLUS the number of neutrons.

32. Element Guide
Proton Number-tells what element it is. (also the atomic number) 2
Explains name of the element. He 4
Explains the total atomic weight-The number of protons PLUS the number of neutrons.