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Look at the following patterns. What are the patterns based on? What do you observe?

Look at the following patterns. What are the patterns based on? What do you observe?. A, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K 1, 4, 9, 16, 25, 36, 49, 64, 81 3, 6, 9, 12, 15, 18, 21, 24.

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Look at the following patterns. What are the patterns based on? What do you observe?

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  1. Look at the following patterns.What are the patterns based on?What do you observe? • A, 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K • 1, 4, 9, 16, 25, 36, 49, 64, 81 • 3, 6, 9, 12, 15, 18, 21, 24

  2. The first pattern established in the periodic table was found in whether an element was a metal, non-metal or a metalloid.

  3. Metals • Most elements are metals • They are found on the left side of the periodic table • All but 1 of these metals are solids at room temperature • Most metals are malleable, shiny, ductile and good conductors of heat and electricity.

  4. Non-Metals • Non-metals are found on the right side of the periodic table (except Hydrogen) • Many of the non-metals are gases at room temperature • Most non-metals are NOT malleable, NOT shiny, NOT ductile and NOT good conductors of heat and electricity

  5. Metalloids • Located along a zig-zag line between the metals and non-metals • Also known as semi-conductors • Possess some of the properties of both metals and non-metals • Usually hard and brittle

  6. Bellringer • Metals 2. Non-metals 3. Metalloids a. Along the zig-zag line b. To the left of the zig-zag line c. To the right of the zig-zag line

  7. 14.1 Physical properties • Characteristics that you can see through direct observation are called physical properties. • Physical properties include color, texture, density, brittleness, and state (solid, liquid, or gas). • Melting point, boiling point, and specific heat are also physical properties.

  8. 14.1 Chemical properties • Properties that can only be observed when one substance changes into a different substance are called chemical properties. • Any change that transforms one substance into a different substance is called a chemical change.

  9. 14.1 The Periodic Table • The periodic table organizes the elements according to their chemical properties and their physical properties. • The periodic table is organized in order of increasing atomic number.

  10. 14.1 The Periodic Table • The periodic table is further divided into periods and groups. • Each horizontal row is called a period. • Each vertical column is called a group.

  11. Rows/Periods • In the periodic table, the row are referred to as periods. • There are 7 periods in the current periodic table. • Each period represents the outermost shell of electrons used by the atoms in that row.

  12. Columns/Groups • In the periodic table, the columns/groups are also referred to as “families” since the elements in them all have a lot of properties that are “related”. • There are 18 groups.

  13. “Families” of the Periodic Table 13-16

  14. Groups 1 & 2 • VERY reactive metals • In nature, they can only be found in combination with other elements

  15. Group 1 – Alkali Metals Physical Properties Chemical Properties React violently with water React with halogen family to form salts Outer shell only contains 1 electron. • Very low densities (most can float) • Soft enough to be cut with a knife

  16. Group 2 – Alkaline-Earth Metals Physical Properties Chemical Properties Highly reactive (but not quite as reactive as alkali metals) Outer shell only contains 2 electrons • Silver colored metals • More dense and harder than the Alkali Metals

  17. Groups 3-12 Transition Metals • Physical Properties • Shiny • Good Conductors • High Melting Points • High Densities • Very malleable & ductile • Hard, strong & tough • Used For • Coins • Electric & Heat applications • Structural materials (building & making things)

  18. Groups 3-12 Transition Metals • Chemical Properties • Not very reactive • Some will react with oxygen to form rust (or something similar) • Transition metals frequently react with each other to form alloys. • Zinc + Copper = Brass • Copper + Tin + Aluminum = Bronze • Gold + Nickel + Palladium = White Gold • Iron + Chromium + Nickel = Steel

  19. Groups 13-16 • All of these groups contain a combination of metals, non metals and metalloids. • All are named after the element at the top of the group. • Metalloids are contained within these groups

  20. Groups 17 & 18 Nonmetals

  21. Group 17 - Halogens Physical Properties Chemical Properties VERY reactive non metals Never found independently in nature…always combined React violently with alkali metals to form salts Outer shell contains 7 electrons • Exist in all 3 phases of matter at room temperature.

  22. Group 18 – Noble Gases Physical Properties Chemical Properties Very stable Do not react with other elements Outer electron shell is full • Colorless, odorless gases at room temperature

  23. Hydrogen • Placed in Group 1 due to its lone electron in the outer shell, but does not share any characteristics of the alkali metals • Colorless, odorless gas at room temp • Reacts violently with oxygen • Most abundant element on earth • More info…

  24. Bellringer • Write a paragraph about the periodic table. It must include at least 10 words from your vocabulary list. Underline the words.

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