1. Elements Chapter 9 Lesson 2

2. Do Now Question What do you know about Elements? 5/15

3. Elementary, My Dear Watson You are going to read page E 1 and E 2 in your notes as an introduction to Elements. When you finish reading, complete the questions on page E 3. After completing the questions on E 3, come up to the front of the class and grab a Periodic Table. You are going to read page E 1 and E 2 in your notes as an introduction to Elements. When you finish reading, complete the questions on page E 3. After completing the questions on E 3, come up to the front of the class and grab a Periodic Table.

4. Do Now Question: What did you learn yesterday about the periodic table? (CRO Format) 5/19

5. Do Now: Find these elements on your periodic table and write down the element symbol, atomic number, and atomic mass. Cadmium Promethium Hydrogen Sulfur Polonium 5/20

6. Elements Define Elements – A material that cannot be broken down into anything simpler by chemical reactions. Water is made of the elements Hydrogen and Oxygen. Neither of these two elements can be broken down into simpler substances. Define Elements – A material that cannot be broken down into anything simpler by chemical reactions. Water is made of the elements Hydrogen and Oxygen. Neither of these two elements can be broken down into simpler substances.

7. Elements How many different elements with different properties are there? 112 + Three important properties of elements are: – The state of matter at room temperature – The way they combine with other elements – Whether they are metals, nonmetals, or metalloids. Most elements are solids, some are gases and a few are liquid at room temperature. How many different elements with different properties are there? 112 + Three important properties of elements are: – The state of matter at room temperature – The way they combine with other elements – Whether they are metals, nonmetals, or metalloids. Most elements are solids, some are gases and a few are liquid at room temperature.

8. Examples Solids are tin, silver, gold, aluminum, lead and iron, etc. Solids are tin, silver, gold, aluminum, lead and iron, etc. Gases are krypton, argon, neon, oxygen, helium, and hydrogen, etc. Gases are krypton, argon, neon, oxygen, helium, and hydrogen, etc. Liquids at room temperature are bromine (used for water filteration) and mercury (used in thermostats and mercury barometers). Liquids at room temperature are bromine (used for water filteration) and mercury (used in thermostats and mercury barometers).

9. Examples Some elements, like magnesium, are more likely to combine with other elements. The elements used to combine with others are called chemically reactive. Magnesium is used in fireworks.

10. Elements Define metals – – Are elements that share common properties like shiny, luster, conductivity and flexibility Partner work: look at the Periodic Table and list some metals: Define metals – – Are elements that share common properties like shiny, luster, conductivity and flexibility Partner work: look at the Periodic Table and list some metals:

11. Do Now Question: What are the three important properties of elements? (CRO Format) 5/21

12. Elements Nonmetals are elements that are dull, poor conductors of electricity and brittle. Partner work: Look at the Table and write down 3 nonmetals. Nonmetals are elements that are dull, poor conductors of electricity and brittle. Partner work: Look at the Table and write down 3 nonmetals.

13. Elements Metalloids are elements with properties in between metals and nonmetals. Partner work: List three metalloids Metalloids are elements with properties in between metals and nonmetals. Partner work: List three metalloids

14. Warm Up ?? ? ?

15. Smaller and Smaller Predict: If you cut an element in half, will it still be an element? _______ – Let’s watch as Mr. Davies cuts the elements into many, many pieces. – NOTE: We are going to pretend that the Aluminum is a PURE aluminum element. Predict: If you cut an element in half, will it still be an element? _______ – Let’s watch as Mr. Davies cuts the elements into many, many pieces. – NOTE: We are going to pretend that the Aluminum is a PURE aluminum element.

16. Smaller and Smaller Circle all the properties of aluminum below: – Metal – Conducts Electricity – Bendable – Shiny – Brittle Circle all the properties of aluminum below: – Metal – Conducts Electricity – Bendable – Shiny – Brittle

17. Smaller and Smaller Elements are made of tiny particles called atoms. Define atom- – The smallest unit of an element that retains (keeps) the properties of that element. Elements are made of tiny particles called atoms. Define atom- – The smallest unit of an element that retains (keeps) the properties of that element.

18. Do Now: Explain the differences between metals, nonmetals and metalloids. (CRO Format) 5/22

19. Parts of any atom are: Nucleus – It’s the center of the atom made up of proton and neutron. – The atom’s weight is in the nucleus. Nucleus – It’s the center of the atom made up of proton and neutron. – The atom’s weight is in the nucleus.

20. Parts of any atom are:

21. Proton – A particle in the nucleus with a positive (+) electrical charge. – The number of protons in an atom is called the atomic number. – The number of protons determines which element it is. Proton – A particle in the nucleus with a positive (+) electrical charge. – The number of protons in an atom is called the atomic number. – The number of protons determines which element it is.

22. Parts of any atom are: Neutron: – A particle with a neutral (0) charge or no electrical charge. – Found in the nucleus with the protons. – To find the number of neutrons, you subtract the # of protons from the atomic mass. Neutron: – A particle with a neutral (0) charge or no electrical charge. – Found in the nucleus with the protons. – To find the number of neutrons, you subtract the # of protons from the atomic mass.

23. Parts of any atom are: Electrons – A particle in the electron cloud surrounding an atom with a negative (-) charge. – They move around the atom in an area called the electron cloud. – Usually the number of electrons (-) and protons (+) are equal so the atom is balanced. (On the periodic table, elements have the same number of protons and electrons.) – Elements on the Periodic Table are arranged by their atomic number. Electrons – A particle in the electron cloud surrounding an atom with a negative (-) charge. – They move around the atom in an area called the electron cloud. – Usually the number of electrons (-) and protons (+) are equal so the atom is balanced. (On the periodic table, elements have the same number of protons and electrons.) – Elements on the Periodic Table are arranged by their atomic number.

24. Do Now: If you did not complete your “structure of an Atom” packet, get with your partner and finish. If you did finish, come up and grab an “Elements and Atoms” worksheet, and complete it on your own. (Try without your notes) If you did not complete your “structure of an Atom” packet, get with your partner and finish. If you did finish, come up and grab an “Elements and Atoms” worksheet, and complete it on your own. (Try without your notes) 5/26

25. Elements