1. Let’s look at some examples!

2. Chemical Symbol
Atomic Number 14 Si
Silicon
28.086
AverageAtomic Mass

3. 1. How many protons does Aluminum have? 2. Is it a metal or non-metal?13 Al
Aluminum
26.982
2. Is it a metal or non-metal?

4. 3. What is the atomic mass of Iodine? 4. Is it a metal or nonmetal?53 I
Iodine
4. Is it a metal or nonmetal?

5. 6. That means it has ____ neutrons.
5. The most common isotope of Iodine has a mass of ______ 53 I
Iodine
6. That means it has ____ neutrons.

6. Al 27-13=14 7. An isotope of aluminum has a mass of 27.
How many neutrons does it have? Al
Aluminum
26.982 13
27-13=14

7. METALS

8. Metals

9. Nonmetals

10. Metals

11. INERT (NOBLE) GASES

13. 8. What group contains the most amount (abundant) of elements?
A. metals
B. non metals
C. metalloids

14. Groups
The Periodic Table is divided into 18 vertical columns, known as groups or families
The elements in each group all have similar characteristics

15. Periods
The Periodic Table is also divided into seven horizontal rows, known as periods
As you move across a period, the elements gradually change properties
The period number is the number of electron energy levels.

16. 9. How many energy levels does this atom have?
10. Based on the number of electrons, what element is it?

17. 11. What element is pictured?
NEON

18. 12. How many energy levels are being used?
13. What period is it in?

19. 14. What is the correct order of elements across the periodic table
14. What is the correct order of elements across the periodic table? Left to Right
A. non-metals, metals, metalloids
B. metalloids, non-metals, metals
C. Metals, metalloids, non-metals

22. 15. A substance made of 2 or more elements chemically combined is a:
A: isotope
B: proton
C: compound

23. 16. According to the periodic table, which elements make up the compound CaCO4 ?
A. Carbon, actinium and oxygen
B. Calcium and Cobalt
C. Calcium, carbon and oxygen

24. 17. What elements are in Mg(OH)2?
Molybdenum and hydrogen
Magnesium, Oxygen, and Hydrogen
Manganese and Osmium

26. Carbon Hydrogen Oxygen Nitrogen
Señor CHON
Carbon Hydrogen Oxygen Nitrogen