Notes Date SPI Periodic Table Tennessee SPI Objective:

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Notes Date SPI 0807.9.9 Periodic Table Tennessee SPI Objective: Use the periodic table to determine the properties of an element. Essential Question(s) How do I use the periodic table to… a) …determine the atomic number? b) …determine the atomic mass? c) …determine the number of sub-atomic particles? d) …determine other properties of an element (atom)? Success Criteria I can use the periodic table to determine the properties of an element (atom).

We use a chart to organize elements called… The Periodic Table F.Y.I We have discovered 98 naturally occurring elements F.Y.I. We have also formed 20 man-made elements 98 + 20 = 118 total

H He 1.0 1 4.0 2 Helium Hydrogen Notes Science SPI 0807.9.9 Periodic Table Notes Science . Most common element (atom) in the universe is hydrogen (About 73% of all matter is hydrogen) 2nd most common element (atom) in the universe is helium (About 25% of all matter is helium) Stars mainly consist of these two elements! Hydrogen H 1.0 1 Helium He 4.0 2 73% of all matter 25% of all matter

Notes Science Periodic table SPI 0807.9.9 Periodic Table Purpose Is a chart of all known chemical elements Displays the different types of atoms (called elements) Purpose Is a tool used to reference information about elements How is it organized Organized into rows called periods Organized into columns called groups (also called families) Arranged in numerical order by the atomic number Also arranged other ways (metals, nonmetals, metalloids, etc.)

H 1 1.0 Hydrogen Notes Science Info in each rectangle SPI 0807.9.9 Periodic Table Notes Science . Info in each rectangle Atomic number is the number of protons! matches the number of electrons! Is a whole number Usually but not always at the top Chemical symbol Element name Atomic mass Is the average mass of a sample of hydrogen atoms Is a decimal number Usually but not always at the bottom Hydrogen H 1.0 1

How to determine the number of neutrons Lithium atoms have 4 neutrons Protons: Three Electrons: Three Neutrons: ?????? Two Simple Steps: Step 1: Round the atomic mass to the nearest whole number Example: 6.941 rounds to 7 Step 2: Subtract the atomic number from this rounded number (Atomic number is 3) Example: 7 - 3 = 4 neutrons Atomic Number Lithium 3 Li 6.941 Atomic Mass Lithium atoms have 4 neutrons

Answer these questions on your paper SPI 0807.9.9 Periodic Table Review Science . Answer these questions on your paper (1) What are elements? Elements are the different types of atoms, pure substances (2) What are the rows and columns called? Rows are periods and columns are groups or families (3) Describe 3 ways the periodic table is organized. …organized in rows (periods) according to the atomic number. …organized in columns (families) according to similarities …organized into metals, nonmetals, and metalloids (4) What is an atomic number? It is the number of protons in an atom (5) What is atomic mass? It is the average mass of a sample of the same kind of atoms

Write down your answers SPI 0807.9.9 Periodic Table Review Science . Write down your answers What is oxygen's atomic number and atomic mass? Oxygen 8 O 16.0 Atomic Number Atomic Mass

O 8 Oxygen Review Science Write down your answers …has 8 protons SPI 0807.9.9 Periodic Table Review Science . Write down your answers How many protons and electrons does each atom of oxygen have? Oxygen 8 O 16.0 Atomic Number …has 8 protons …also has 8 electrons The number of protons and electrons are always the same.

Write down your answers Oxygen atoms have 8 neutrons SPI 0807.9.9 Periodic Table Notes Science . Write down your answers How many neutrons does each atom of oxygen have? Two Simple Steps: 1) Round the atomic mass to the nearest whole number Example: 16.0 rounds to 16 2) Subtract the atomic number from this rounded number Reminder: Atomic number is 8 Example: 16 - 8 = 8 neutrons Oxygen 8 O 16.0 Atomic Number Atomic Mass Oxygen atoms have 8 neutrons

Science Review Questions SPI 0807.9.9 Periodic Table How many neutrons? 1) Round the atomic mass 85.5 rounds up to 86 2) Subtract the atomic number from the atomic mass. 86 minus 37 = 49 neutrons Atomic Number Atomic Mass

The number of protons and electrons are always the same. SPI 0807.9.9 Periodic Table The number of protons and electrons are always the same. Science Questions How many neutrons? 1) Round the atomic mass 20.2 rounds down to 20 2) Subtract the atomic number from the atomic mass. 20 minus 10 = 10 neutrons Atomic Number (number of protons) Atomic Mass

Science Questions SPI 0807.9.9 Periodic Table Atomic Mass (Bromine) Atomic Number (Iodine)

The number of protons and electrons are always the same. SPI 0807.9.9 Periodic Table The number of protons and electrons are always the same. Science Questions How many neutrons? 1) Round the atomic mass 47.9 rounds up to 48 2) Subtract the atomic number from the atomic mass. 48 minus 22 =26 neutrons Atomic Mass Atomic Number (number of protons)

Science Questions SPI 0807.9.9 Periodic Table Atomic Number (number of protons) Atomic Mass (Bromine)