Atoms Is made Up of 2 Parts: The Nucleus: 1. Protons 2. Neutrons The Rings: 1. Electrons.

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Presentation transcript:

Atoms

Is made Up of 2 Parts: The Nucleus: 1. Protons 2. Neutrons The Rings: 1. Electrons

How to Make an Atom: Protons = Atomic # 1.Protons: Look at the atomic # and draw the number of Protons. 2.Electrons: Same as Protons. Want to keep + / - balance.

How Do you Find # of Neutrons? : 2. Neutrons: Round the atomic Mass to the nearest whole number (7) 3. then subtract the atomic # from the atomic Mass. (7- 3=4) 3 Li 6.94

How to Make an Atom: 4.Electrons: Is the same number as the Protons, and Atomic #. 5.Place them on the Rings. But Remember: 1st Ring = 2 E 2nd Ring = 8 E 3rd Ring = 18 E

Practice: 3 Li B 10.81

More Practice: 10 Ne Ca 40.08

1. What is the Atomic # of Calcium: A B.20 C.19 D Ca B

2. How many protons does a Cobalt atom have? A. 30 B. 27 C D Co B

3. What is the Atomic Mass of Hydrogen? A. 1 B. H C.1.01 D H 1.01 C

4. How many electrons does Potassium have? A. 19 B C. 40 D K A

5. How many neutrons does Beryllium have: A. 4 B. 6 C D. 5 4 Be 9.01 D

6. How many neutrons does Boron have? A. 5 B C. 6 D B C

7. How many shells does an atom of Nitrogen need? A. 1 B. 2 C. 3 D. 4 7 N B

8. How many shells does Carbon have? A. 6 B. 2 C. 3 D. 4 6 C B

9. How many electrons does Magnesium have? A. 12 B C. 13 D Mg A

10. How many shells does Hydrogen have? A. 1 B. 2 C. 3 D. 4 1 H 1.01 A

11. How many protons does Silicon have? A. 16 B C. 15 D Si D

12. What is the atomic mass of Aluminum? A. 13 B. 27 C D Al C