Structure of Atoms Lesson for Middle School from SlideSpark Science

Atomic Structure Part 1 Lesson 2

RED SLIDE: These slides contain critical notes and important fill-in the blanks. Please record the important terms in your work bundle. You’ll need these notes to complete the work bundle and to be successful on the review game. Copyright © 2024 SlideSpark .LLC First and last Name Science, Grade, Class

Respect Safety Responsibility Make Good Choices Listen to the teacher and others. Please no shout outs. One speaker at a time. Please raise your hand. First, Last, and Always. Focus on Task completion Avoid Distractions Stay Organized Help Others Be Present Never Give Up! Copyright © 2024 SlideSpark .LLC Science from Murf LLC

(Optional) Recommended Link! Khan Academy Introduces the Atom. 21 minutes http://www.khanacademy.org/video/introduction-to-the-atom?playlist=Chemistry

Video! Cathode Ray tube. Record a picture of it in your journal and how it worked to help show that atoms carry a charge . https://www.youtube.com/watch?v=FNiHCnqPAH4&ab_channel=ChemistryDemoLabOhioStateUniversity Copyright © 2024 SlideSpark .LLC + -

What did this study find? It helped lead J.J. Thomson to realizing that this ray is negatively charged. (electron) Copyright © 2024 SlideSpark .LLC + - + Learn more: http://explorable.com/cathode-ray-experiment.html

Which charge on the end of the magnet?

Which charge on the end of the magnet? - Negative Charge

The Crookes T ube is an early experimental electrical discharge tube, with partial vacuum, invented by English physicist William Crookes and others, in which cathode rays were discovered. Crookes Tube (1869-1875) This device helped discover the properties of cathode rays, culminating in J.J. Thomson's 1897 identification of cathode rays as negatively charged particles, which were later named electrons. Florescent Paper Magnet used to deflect the beam - -

Plum Pudding

Knowing that an atom had a charge was just the first step. Scientists still didn’t know the structure of the atom. J.J. Thomson’s early plum pudding model of an atom. Copyright © 2024 SlideSpark .LLC electrons electrons Incorrect

Ernest Rutherford’s experiment used particles and reflection to determine the structure of the atom. What is the mystery shape on the next slide? Use your knowledge of reflection ? Copyright © 2024 SlideSpark .LLC

In Rutherford's experiment, a radioactive source shot a stream of alpha particles at a sheet of very thin gold foil which stood in front of a screen. The alpha particles would make small flashes of light where they hit the screen. Copyright © 2024 SlideSpark .LLC

The Rutherford Gold Foil experiment shot minute alpha particles at a thin sheet of gold.

The Rutherford Gold Foil experiment shot minute alpha particles at a thin sheet of gold. It was found that a small percentage of the particles were deflected, while a majority passed through the sheet.

The Rutherford Gold Foil experiment shot minute alpha particles at a thin sheet of gold. It was found that a small percentage of the particles were deflected, while a majority passed through the sheet. This caused Rutherford to conclude that the mass of an atom was concentrated at its center. “Nucleus”

Since some of the positive alpha particles were substantially deflected, Rutherford concluded that there must be something inside an atom for the alpha particles to bounce off of, Copyright © 2024 SlideSpark .LLC

Since some of the positive alpha particles were substantially deflected, Rutherford concluded that there must be something inside an atom for the alpha particles to bounce off of, that must be small, dense, and positively charged. Copyright © 2024 SlideSpark .LLC

Since some of the positive alpha particles were substantially deflected, Rutherford concluded that there must be something inside an atom for the alpha particles to bounce off of, that must be small, dense, and positively charged. Called the… Copyright © 2024 SlideSpark .LLC

Since some of the positive alpha particles were substantially deflected, Rutherford concluded that there must be something inside an atom for the alpha particles to bounce off of, that must be small, dense, and positively charged. Called the… Copyright © 2024 SlideSpark .LLC The Nucleus

Video Link! History of the Atom. http://www.youtube.com/watch?v=njGz69B_pUg

An Atom is the smallest part of an element which can take part in a chemical reaction . Copyright © 2024 SlideSpark .LLC Chemical reaction: A process in which atoms of the same or different elements rearrange themselves to form a new substance.

If an atom was a football stadium, the nucleus is…

If an atom was a football stadium, the nucleus is… A blueberry in the middle

Neutron: A particle that appears in the nucleus of all atoms except hydrogen. Neutrons have no electrical charge and just a bit more mass than a proton. A neutron walks into a video store. Copyright © 2024 SlideSpark .LLC

Neutron: A particle that appears in the nucleus of all atoms except hydrogen. Neutrons have no electrical charge and just a bit more mass than a proton. He asks the clerk “How much are the movies?” Copyright © 2024 SlideSpark .LLC

Neutron: A particle that appears in the nucleus of all atoms except hydrogen. Neutrons have no electrical charge and just a bit more mass than a proton. He asks the clerk “How much are the movies?” Copyright © 2024 SlideSpark .LLC “For you…” “No Charge.”

Neutron: A particle that appears in the nucleus of all atoms except hydrogen. Neutrons have no electrical charge and just a bit more mass than a proton. He asks the clerk “How much are the movies?” Copyright © 2024 SlideSpark .LLC

= Proton = Neutron = Electron = Crouton

Proton Neutron Electron

Proton Neutron Electron Mass Charge

Proton Neutron Electron Mass Charge 1 +1

Proton Neutron Electron Mass Charge 1 1 +1

Proton Neutron Electron Mass Charge 1 1 +1 -1

Proton Neutron Electron Mass Charge 1 1 +1 -1 -Electron Neutron Proton + +

Nucleus: The positively charged center of the atom. The nucleus has an incredibly high density. Copyright © 2024 SlideSpark .LLC Equal to 2.3×10 17 kg/m 3 Can you write it out long hand? 230,000,000,000,000,000 kg/m 3

Nucleus: The positively charged center of the atom. The nucleus has an incredibly high density. Copyright © 2024 SlideSpark .LLC Or about 6 billion cars stuffed into a small cardboard box. This should be you!

Nucleus Note: Nucleus and electrons not to size. If an atoms was the school gymnasium, the nucleus would be the size of a speck of dust.

Nucleus

Nucleus Atoms General. Learn more before the quiz. at… http://web.jjay.cuny.edu/~acarpi/NSC/3-atoms.htm Lithium will always have 3 Protons

Nucleus Atoms General. Learn more before the quiz. at… http://web.jjay.cuny.edu/~acarpi/NSC/3-atoms.htm Lithium will always have 3 Protons a nd 3 electrons

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Bonus Question! Name the Superhero?

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1 Nucleus

1 Nucleus Could be the proton in Hydrogen and the electron is flying around.

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2 Electron

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3 Neutron

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4 Proton

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5 Electron

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6 Nucleus

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7 Electron

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8 Nucleus

8 Nucleus Electron Cloud

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9 Nucleus

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10 Proton and the nucleus Must be Hydrogen

Bonus Question! Name the Superhero?

Bonus Question! Name the Superhero? The Flash

Atomic Structure Part 1 Lesson 2

Structure of Atoms Lesson for Middle School from SlideSpark Science

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Structure of Atoms Lesson for Middle School from SlideSpark Science

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