Presentation on theme: "1. What is an atom? The smallest unit of an element that still has all the properties of that element. 2. Where are atoms found? Atoms are found in everything."— Presentation transcript:
1 1. What is an atom? The smallest unit of an element that still has all the properties of that element. 2. Where are atoms found? Atoms are found in everything. 3. What particles make up an atom? Atoms are made up of protons, neutrons, & electrons
2 Describe the three subatomic particles 4. Neutron is subatomic particle found in the nucleus of an atom and has no charge.5. Proton is a positively charged particle found in the nucleus of an atom.6. Electron is a negative charged particle that is located around the nucleus.
3 7. Explain what an electron cloud is. Area or region around the nucleus of an atom where the electrons are located.8. Define matterAnything that has mass and takes up space.9. Lights volume cannot be measured and it has a mass of 0 grams. Is it matter? ExplainNo, it is not matter because it does not have mass.
4 Periodic Table Study Guide How to Draw Bohr Diagrams6th Grade ScienceMr WegleyBorrowed from Mrs. Larosa
5 Bohr Diagrams Find your element on the periodic table. Determine the number of protons – it is the same as the atomic number.This is how many protons you will draw in the nucleus.
6 Bohr Diagrams In the center of the paper draw that many protons. + + +
7 Bohr DiagramsThen find the number of neutrons by subtracting the number of protons from the atomic mass.12 – 6 = 6Add that many neutrons.+NN+N+N++N+NN
9 Bohr Diagrams Find out which period (row) your element is in. Elements in the 1st period have one energy level.Elements in the 2nd period have two energy levels, and so on.
10 Bohr Diagrams Each level hold a different amount of electrons. 1st holds 22nd holds 83rd holds 84th holds 185th holds 326th holds 327th holds 188th holds 8
11 Bohr Diagrams Draw a nucleus with . Carbon is in the 2nd period, so it has two energy levels, or shells.Draw the shells around the nucleus.+NN+N+N++N+N
12 Bohr Diagrams Add the electrons. Carbon has 6 electrons. The first shell can only hold 2 electrons.+NN+N+N++N+N
13 Bohr DiagramsSince you have 2 electrons already drawn, you need to add 4 more.These go in the 2nd shell.Add one at a time -starting on the right side and going counter clock-wise.+NN+N+N++N+N
14 Bohr Diagrams Check your work. You should have 6 total electrons for Carbon.Only two electrons can fit in the 1st shell.The 2nd shell can hold up to 8 electrons.The 3rd shell can hold 18, but the elements in the first few periods only use 8 electrons.+NN+N+N++N+N
15 Bohr DiagramsTry the following elements on your own:HHeOAlNeK
16 Bohr Diagrams Try the following elements on your own: H – 1 electron AlNeK+
17 Bohr Diagrams Try the following elements on your own: H He - 2 electronsOAlNeK+NN+
18 Bohr Diagrams O Try the following elements on your own: H He O - 8 electronsAlNeKO
19 Bohr Diagrams O Try the following elements on your own: H He O Al- 13 electronsNeKO
20 Bohr Diagrams Ne Try the following elements on your own: H He O Al Ne - 10 electronsKNe
21 Bohr Diagrams K Try the following elements on your own: H He O Al Ne K - 19 electronsK
22 Bohr DiagramsEnd of Study Guide. You should know how to draw a Bohr Diagram for the first 20 elements.