1. Chemical Properties – Those properties of a substance that describe how it changes while being converted into a different substance.

2. Turn in acid and base lab report if you have not done so yet.
Get out element report handout

3. Usually results in a change in color.
Chemical Change – Takes place when two or more substance unite or break apart chemically.
New substance has properties that are different than the original substance.
Usually results in a change in color.

4. Element – Simplest type of substance.

5. Atoms – The smallest particles of matter.
An element cannot be broken down to anything smaller than one particular kind of atom.

6. Compound – A new substance formed from the chemical union of two or more elements.

7. H2O – Water, An example of a compound. H stands for Hydrogen
O stands for Oxygen
Has 2 Hydrogen atoms and 1 Oxygen atom.

8. H2O2 – Hydrogen Peroxide, an example of a compound.
H stands for Hydrogen
O stands for Oxygen
Has 2 Hydrogen atoms and 2 Oxygen atoms.

9. CO2– Carbon Dioxide, An example of a compound. C stands for Carbon
O stands for Oxygen
Has 1 Carbon atom and 2 Oxygen atoms.

10. CO3– Carbon Trioxide, An example of a compound. C stands for Carbon
O stands for Oxygen
Has 1 Carbon atom and 3 Oxygen atoms.

11. C2O3
How many carbon atoms? 2
How many oxygen atoms? 3

12. Write the chemical formula for Magnesium tri-chloride (magnesium to chlorine ratio 1 to 3)
MgCl3
Write the chemical formula for Nickel di-oxide (nickel to oxygen ratio 1 to 2)
NiO2

13. Chemical Reaction– The process of forming a chemical bond.
Always involves a chemical change.

14. - Nucleus – Core of an atom. - Contains protons and neutrons.
- Electrons circle the nucleus.

15. Proton – Has a positive electric charge.
Atomic Number – The number of protons found in the nucleus.

16. Electron – Has a negative electric charge.

17. Neutron – Has no charge

18. Scientific Notation – A short cut to writing out extremely large or small numbers.

19. Atomic Mass – The sum of the number of protons and neutrons found in the nucleus of an average atom of that element.

22. Stable Atom– Equal number of electrons and protons.

23. Molecule– Two or more atoms that are chemically united.
Can be the same element, or different elements.

24. Chemical Symbol - Identifies each element.
Always begins with a capital letter, and the second letter is always written in lower case.
Chlorine is Cl, Titanium is Ti, Hydrogen is H

25. Periodic Table of the Elements - Has all of elements and their atomic weights.

26. Chemical symbol of Lithium? Chemical symbol of Calcium?

27. What element does Na represent? What element does Pb represent?
Sodium
What element does Pb represent?
Lead

28. What is the atomic number of Cadmium?48
What is the atomic number of Oxygen? 8

29. How many protons does Cadmium have? How many protons does Oxygen have?48
How many protons does Oxygen have? 8

30. What is the atomic mass of Aluminum?
26.98
What is the atomic mass of Chromium? 52

31. How many neutrons does aluminum have?
26.98 – 13 = 13.98, or 14
What is the number of neutrons of Chromium?
52-24 = 28

32. How many electrons does Nitrogen have?7
How many electrons does Argon have? 18

33. Yes, 7 electrons and 7 protons Yes, 18 electrons and 18 protons.
Is Nitrogen stable?
Yes, 7 electrons and 7 protons
Is Argon stable?
Yes, 18 electrons and 18 protons.