Take out your Unit 1 HW, parts A-D should be complete! Science Starter 17.74 + 0.0006 + 52.1 = 2 x 12 = How many millimeters in .25 kilometers? Give one example of a physical and chemical change Approximately how many copper atoms are there in a penny? Take a guess!

Size of an Atom How many copper atoms make up a penny? ANSWER: approximately 2.4 x 1022 atoms. Radii of most atoms: 5x10-11m to 2x10-10m

SBWAT describe general atomic structure of neutral atoms Objective SBWAT describe general atomic structure of neutral atoms SWBAT identify relevant information from periodic notation and nuclear notation elements

Agenda Science Starter Unit 1 Chemistry Matters Quiz Atomic Scavenger Hunt Introduction into atoms/elements Periodic Table Practice Exit Ticket/Homework

Unit 1 Chemistry Matters Quiz No cell phones No wandering eyes No talking When you are finished, raise your hand and I will come to you.

Unit 1: Chemistry Matters Atomic Structure February 2, 2016

ATOMIC STRUCTURE

Atomic Scavenger Hunt Subatomic Particle Symbol Location Charge Mass PROTON NEUTRON ELECTRON Goals for the scavenger hunt: Fill in the subatomic particle chart (shown above) Jot down any other notes that you think are important

Expectations You will move around the room in an orderly manner. You do not have to wait for me to tell you to transition— you may move as you finish filling out the information You may NOT run I should NOT hear your voice over anyone else’s You will have 7 minutes to complete this.

Subatomic Particles Protons Neutrons Electrons

Protons, Neutrons, & Electrons Subatomic Particle Symbol Location Charge Mass PROTON NEUTRON ELECTRON

TEDEd: Just How Small is an Atom? https://www.youtube.com/watch?v=yQP4UJh Nn0I

Periodic Notation Chemical Symbol Chemical Name

Periodic Notation Elements are different because they contain different numbers of protons Atomic number: number of protons in the nucleus of an atom of that element Atomic Mass: Average mass of all isotopes on the planet. ** ELEMENTS ARE IDENTIFIED BY THEIR ATOMIC NUMBERS!

Nuclear Notation Ne 20 Mass Number 10 Atomic number Chemical Symbol

*The number of protons* DEFINES THE ELEMENT The number of electrons and neutrons can change, but carbon will ALWAYS have 6 protons. If Carbon had 7 protons, what would it be? If it had 5 protons, what would it be?

PRACTICE! Element Chemical Symbol Atomic Number Mass Number Chlorine Potassium Cobalt Aluminum Oxygen

Mass Number The Periodic Table does NOT tell us something called the MASS NUMBER. MASS NUMBER = # Protons + # Neutrons  This will tell us the mass of the atom!! **In order to know this number, it must be given OR number of neutrons must be given!!**

How do we calculate subatomic particles? Atomic number = # of protons = # of electrons If MASS NUMBER = # Protons + # Neutrons, then how do we calculate # neutrons if only given Mass number and atomic number?  # Neutrons = Mass Number – Atomic Number

107 47 Ag

Grab your white board and marker! EXIT TICKET Grab your white board and marker!

Exit Ticket- Do with your group on your whiteboard! The atomic number represents the number of ______ Neutrons and Protons are found in the ___ of the atom Which atom has an atomic number of 18