Transcript Notes Atoms
Notes PRESS THE RIGHT-ARROW BUTTON SPI 0807.9.1 ON YOUR KEYBOARD TO ADVANCE THROUGHAtoms THE PRESENTATION Atoms (Part 2): All matter is made up of atoms The different types of atoms are called elements Atoms are made of 3 sub-atomic particles… …protons (are the blue circles) …neutrons (are the green circles) …electrons (are the orange circles) Nucleus Note: Protons and neutrons are found in the center area called the nucleus Here is a model of Note: In atoms the number of protons and one lithium atom electrons are always the same (3 in this case) Notes: Sub-Atomic Particles SPI 0807.9.1 Atoms Protons: positive charge, found in the nucleus of atoms The number of protons is the atomic number (3 in this case) Note: In atoms the number of protons & electrons are the same Neutrons: no charge, also found in the nucleus of atoms Electrons: negative charge, found in electron shells in the electron cloud Legend =protons =neutrons =electrons Notes SPI 0807.9.1 Atoms Atomic Mass Atoms are very small particles of matter, and everything that is made of matter has mass Most of the mass of an atom is found in the nucleus • About 99.9% of the mass of an atom is in the nucleus Nuclear Particles The two particles in the nucleus, protons and neutrons, make up 99.9 % of the mass of the atom 3 Legend Li =protons =neutrons Lithium =electrons 6.9 99.9% The atomic mass for this atom is 6.9 It is displayed on the periodic table like this. Notes Electrons SPI 0807.9.1 Atoms Electrons are located in the electron cloud in areas called electron shells (see cloud in green area below) This atom has 2 electron shells. These can also be called electron electron energy energy levels levels or electron electron orbitals. orbitals 1st Shell Legend The green area is the electron cloud area =protons =neutrons =electrons 2nd Shell Nucleus Online Resources SPI 0807.9.1 Atoms Electron Cloud Animation Now prepare to go to the Holt Online website (link is at the bottom of this slide) Here are the steps to find this animation (A) First click on the Holt Online link shown below, and log on (B) Find and click on our science textbook (go to online textbook) (C) Select "chapter 10," and click "Go" (D) Next find and click the yellow tab titled "eActivities" (E) Then beneath the gold "Visual Concepts" tab, find and click the section one link titled "Electron Cloud." (F) Write down 2 sentences describing what you learn. (Click the link below for this "Visual Concepts" presentation) Link: Holt Online Textbook Website Video Links SPI 0807.9.1 Atoms Next…view online presentations about atoms (A) Click on the links below to watch these 3 videos about atoms (B) For each one, write down 2 sentences describing what you learn (Click the links below to see learn more about atoms) Link: Atoms-silly animation Link: Atoms-scale of the universe • Note: Zooms in down to the atomic level Link: Hierarchy of matter-down to atoms • Note: Also zooms in down to the atomic level