Integrated Science Unit 7, Chapter 19.

Slides:



Advertisements
Similar presentations
CHEMICAL BONDING.
Advertisements

Chapter 6: Chemical Bonds
Molecules and Compounds
Chapter 19 Chemical Bonds.
Chapter 6: Chemical Bonds
Oxidation Numbers.
Atomic Structure & Chemical Bonds
Integrated Science Unit 7, Chapter 19.
Question set 1 Question set 2 Question set 3 Question set 4 Question set 5 Question set 6 $ $ $ $ $ $ $
Unit 7: Changes in Matter
Chemical Bonds Ionic Bonds.
The Periodic Table & Formation of Ions
Ionic Compounds Atoms are rarely found in nature in their pure state. Most often they are combined with other elements in compounds. Two major types of.
Tech Notes: Why Atoms Combine  Molecule and Compound:  Two or more atoms chemically combined  Have completely different properties than those of the.
Chapter 18: Chemical Bonds
 Ion – atom or group of atoms that has an electric charge  Ionic bonds form when atoms gain or lose electrons.  When an atom loses an electron, it.
Ions and Ionic Bonding. Electrons and Energy Levels First, let’s review: First, let’s review: Electrons are found in energy levels Electrons are found.
Lewis Structure and Bonding. Lewis Dot Diagram of Atoms The chemical symbol for the atom is surrounded by a number of dots corresponding to the number.
Chemical Bonds & Reactions Chemical Bond A force of attraction that holds two atoms together involves the sharing or transfer of valence electrons.
IPC Notes Stability in Bonding & Electron Dot Diagrams.
P. Sci. Unit 8 Periodic Table Chapter 5. Periodic Law Properties of elements tend to change in a regular pattern when elements are arranged in order of.
The Periodic Table Atomic Number (number of protons) Symbol Atomic Mass Period.
Ions are formed when atoms gain or lose valence electrons to achieve a stable octet electron configuration. Section 1: Ion Formation K What I Know W What.
Unit 2 Chemistry and Radioactivity
Rules For Writing Chemical Formulas and Naming Compounds IPC 2007.
Chapter 19 – Molecules and Compounds Bonding and Molecules Atoms react /combine with other atoms to form molecules. Chemical bonds hold them together.
Elements and Their Properties
IPC 7.D Relate the chemical behavior of an element, including bonding, to its placement on the periodic table.
CHEMICAL BONDING Occurs when 2 or more atoms combine by sharing or transferring electrons. –Can be from the same element (O 2 ) or different elements (NaCl)
P. Sci. Unit 8 Periodic Table Chapter 5. Periodic Law Properties of elements tend to change in a regular pattern when elements are arranged in order of.
Properties of Atoms and the Periodic Table Chapter 18.
Chapter 4 Formation of Compounds
Notes 6 - Ions & Chemical Bonding. Unstable Atoms ► In order to be stable, an atom needs a certain number of valence electrons  2 valence e - if it only.
Ionic Compounds Test Date: Tuesday, Nov 15th. How many atoms in a 154 lb person? There are 7.0 x atoms!!! There are 7.0 x atoms!!! –Broken.
Atoms and the Periodic Table
What determines an element’s chemistry. When atoms combine they form compounds. Electrons of an atom are found in different energy levels. Valence electrons.
Binary compounds Chapter 6 part I. Chemical Formulas Chemical formulas inform as to the type of elements that make up the compound and in what ratios.
IPC 03B Chemical Bonding. Number of Valence Electrons Valence Electrons: Are electrons in the _________________________________________ The __________gases.
CHAPTER 19. Unit Content Map Unit EQ: How are ionic and covalent bonds different? Topic: Bonds What are Chemical bonds? Vocabulary: isotope, stable, ionic.
IPC 03B Chemical Bonding.
Chapter 4 Formation of Compounds
Atomic Structure and Chemical Bonds
Using Lewis Dot Structures to show Bonding. Remember Lewis Dot Structures?  Lewis dot structures are a way to represent the valence electrons for a particular.
IONS 7.1 Valence Electrons, The Octet Rule, and formation of Cations and Anions.
Atoms chemically bond in an attempt to feel stable like noble gases. They do this by either filling their valence shells or getting rid of the electrons.
Groups/Columns/Families: vertical. Have similar properties. Periodic Table: Special Families 1.Group 1: Alkali Metals – 1 electron in the valence (outermost)
Chapter 6: Chemical Bonds When the highest occupied energy level of an atom is filled with e, the atom is stable and not likely to react. In other words,
Chapter Sixteen: Compounds  16.1 Chemical Bonds and Electrons  16.2 Chemical Formulas  16.3 Molecules and Carbon Compounds.
COMPOUNDS Chapter Sixteen: Compounds  16.1 Chemical Bonds and Electrons  16.2 Chemical Formulas  16.3 Molecules and Carbon Compounds.
The Periodic Table Physical Science Mr. Willis. Periodic Table Arrangement Dmitri Mendeleev created the Periodic Table in 1869 Symbols are primarily Latin.
6.1 Ionic Bonding   HES Chemistry Unit: Ions and Ionic Bonds.
Chapter 8 Chemical Bonding. Section 1 Electrons A chemical bond is the joining of atoms to form new substances with new properties –Compounds will not.
Ionic Compounds PICK UP AN IONIC COMPOUNDS UNIT PACKET
Unit 7 Changes in matter Chapter 19 Molecules and compounds.
Chapter 6 Objectives Section 1 Introduction to Chemical Bonding
What elements form ionic compounds? How is an ionic bond formed?
Groups of Elements: Additions to your periodic table
Atomic Theory Atoms are made up of smaller particles called subatomic particles.
Ionic and metallic bonding
MOLECULES AND COMPOUNDS
Lewis Dot Diagrams.
Chapter 13 Chemical Formulas.
November 5, 2015 BELLRINGER: Why do elements bond with other elements?
ELECTRONS AVAILABLE FOR BONDING
ELECTRONS AVAILABLE FOR BONDING
The Periodic Table Naming Compounds Writing Formulas
Objectives Know how to use the periodic table to determine the number of electrons available for bonding. Know how to draw Lewis dot structures.
Chemical Bonding Test Review
Ionic Compounds Atoms are rarely found in nature in their pure state. Most often they are combined with other elements in compounds. Two major types of.
Presentation transcript:

Integrated Science Unit 7, Chapter 19

Chapter 19 Learning Goals Relate the chemical behavior of an element, including bonding, to its placement on the periodic table. Identify how elements form chemical bonds and the role of electrons in bonding. Predict the chemical formulas of compounds made up of two different elements. Write chemical formulas for compounds made up of many different types of elements. Calculate the formula mass of a compound and compare different compounds based on their formula masses. Identify the environmental and economic impact of recycling plastics.

Chapter 19 Vocabulary Terms Avogadro number chemical bond chemical formula covalent bond diatomic molecule energy level formula mass ion ionic bond monoatomic ion octet subscript polymer polyatomic ion react valence electron

*Read text section 19.1 AFTER Investigation 19.1 19.1 Bonding and Molecules Key Question: Why do atoms form chemical bonds? *Read text section 19.1 AFTER Investigation 19.1

19.1 Bonding and Molecules The outer electrons are involved in bonding. These are called valence electrons. Most stable atoms have eight valence electrons. (Some have two) When an atom has 8 valence electrons, it is said to have an octet of electrons. 8 1 7 2 6 3 5 4

19.1 The Octet Rule

19.1 Bonding and Molecules A sodium atom is chemically unstable because it has only one valence electron. With the exception of the transition metals, the column of the table tells you how many valence electrons each element has. Columns are called groups. For example, the atoms of the elements in Group 1A have only one valence electron. 1

If it helps put the valence e- in ()

Group 1 the alkali metals or lithium family Group 2 the alkaline earth metals or beryllium family Group 3 scandium family (consisting of the rare earth elements plus the actinides) Group 4 the titanium family Group 5 the vanadium family Group 6 the chromium family Group 7 the manganese family Group 8 the iron family Group 9 the cobalt family Group 10 the nickel family Group 11 the coinage metals (not an IUPAC-recommended name) or copper family Group 12 the zinc family Group 13 the boron group or boron family Group 14 the carbon group or carbon family Group 15 the pnictogens or nitrogen family Group 16 the chalcogens or oxygen family Group 17 the halogens or fluorine family Group 18 the noble gases or helium family or neon family

Lewis Dot Structures Count the total valence electrons for the molecule Figure out how many octet electrons the molecule should have, using the octet rule: All atoms want 8 except for H and He = 2 If the number is 3 or less atom gives up those negative e-! If the number is 4 or more atom will gain enough e- to make 8.

19.1 Ionic Bonds Ionic bonds are formed when atoms gain or lose electrons. Sodium and chlorine form an ionic bond to make sodium chloride (table salt).

19.1 Covalent Bonds When electrons are shared between two atoms, a covalent bond is formed.

19.1 Ionic or Covalent Bond? Elements can be classified as metals, metalloids, and nonmetals. Generally, bonds between a metal and a nonmetal tend to be ionic in character. Bonds between two nonmetals can be classified as covalent.

19.2 Chemical Formulas Key Question: Why do atoms combine in certain ratios? *Read text section 19.2 AFTER Investigation 19.2

19.2 Chemical Formulas All compounds have an electrical charge of zero; that is, they are neutral.

19.2 Oxidation Number An oxidation number indicates how many electrons are lost, gained, or shared when bonding occurs.

Common Polyatomic Ions

19.3 Comparing Molecules Key Question: What is the meaning of a chemical formula? *Read text section 19.3 AFTER Investigation 19.3

19.3 Comparing Molecules One atom of hydrogen is 1/12 the mass of a carbon atom.

19.3 Comparing Molecules

19.3 Comparing Compounds The Avogadro number is the number of atoms in the atomic mass of an element or the number of molecules in the formula mass of a compound when these masses are expressed in grams. One set of 6.02 x 1023 atoms or molecules is also referred to as a mole of that substance.