Transcript Catalyst
Catalyst Finish these sentences: • Elements are… • I THINK atoms are… Homework Time Unit 1 – Atomic Theory and the Periodic Table Death by Element Who’s in Charge? 300 250 Length (mm) 200 It takes 31 cuts to get to the size of the atom! It is 0.0000007 mm! 150 100 50 0 0 5 10 15 20 Number of Cuts 25 30 35 Cuts 0 1 2 3 4 6 8 12 14 18 19 24 31 Size (mm) 280 140 70 35 17.5 4.375 1.09375 0.068359375 0.017089844 0.001068115 0.000534058 1.66893E-05 1.30385E-07 Reference N/A Child's hand Fingers Watch Keyboard keys Poppy seeds Thread Human Hair Width of paper Bacteria Visible light waves Membranes Size of the atom! Lecture 1.1 – Introduction to the Atom Today’s Learning Target • LT 1.1 – I can identify the size, location, and mass of the three subatomic particles found in the atom. Size of the Atom • The atom has a diameter between 0.1 – 0.5 nm • Point of reference: A basketball has a diameter of 234,500,000 nm Three Types of Subatomic Particles • All atoms contain the following subatomic particles: 1. Protons 2. Neutrons 3. Electrons Protons • Protons are found in the nucleus of an atom. • The nucleus is located in the center of the atom. • Protons have a positive charge. We say that their charge is +1 Neutrons • Neutrons are found in the nucleus of an atom. • Neutrons do not have a charge. They are neutral James Chadwick discovered the neutron in 1932! Mass of Protons and Neutrons • Protons and neutrons have the same mass. • Each subatomic particle has a mass of 1 amu. – amu = atomic mass unit Electrons • Electrons are found in the electron cloud. • The electron cloud surrounds the nucleus of an atom. • Electrons have a -1 charge Mass of Electrons • Electrons have a mass that is 0.00054 amu. • Electrons do not contribute to the weight of an atom. Neutral • Like the car gear, like water, like switzerland! To be neutral, the positives and negatives must cancel out! Neutral Tweet! Equal nmbr of protons and electrons #Chemswag #Learning #MrAstorIsABoss The resulting charge is zero! SUMMARIZE Collaborative Station: Death by Element Reading • Complete the reading with your table • You must answer all questions Exit Ticket Subatomic Particle Proton Neutron Electron Size Charge Location Rate Yourself • Based on the exit ticket and your current level of understanding, rate yourself 1 – 4 on LT 1.1 Closing Time • No homework!