Writing Formulas Oxidation Numbers & Chemical Formulas Mrs. Wolfe.

Slides:

Advertisements

Similar presentations

Compound 2 or more elements combined in a fixed proportion Binary Composed of 2 elements.

Advertisements

Ionic Bonds Section 3. Ion An atom or group of atoms that has become electrically charged.

Writing Ionic Formulas Calcium Chloride Locate the metal on the periodic table and write the element symbol with its oxidation number. Ca +2.

IONIC COMPOUNDS Chapter 5.8. IONIC COMPOUNDS Recall: Metals form positive ions (+) and non-metals form negative ions (-). Na 1+ Cl 1-

Using the cards – Match up the element’s symbol with its atomic structure.

Activity Directions: Use the worksheet to guide you as you create the formulas. You will be matching the blue and yellow elements according to their valance.

Starter Give the electronic configuration of an atom of: Be Mg Ca Where are these elements found in the periodic table?

Ionic Compounds Ionic Compounds. Chemistry Joke Q: Why do chemists like nitrates so much? A: They’re cheaper than day rates!

How to Make Ionic Bonds. Ionic Bonds Remember the Octet Rule? How many electrons do atoms need to be happy and stable? Ionic bonds are created when atoms.

© 2014 Pearson Education, Inc. Chapter 6 Lecture Basic Chemistry Fourth Edition Chapter 6 Ionic and Molecular Compounds 6.2 Writing Formulas for Ionic.

IONIC COMPOUNDS. Ionic Chart Formed from metallic and nonmetallic elements Forms ions in solution Conducts electricity Solid at room temperature.

Forming and Naming Ionic Compounds (Type 1 and 2 Binary Compounds)

Introduction to Chemical Compounds Why do elements combine?

Ions & Ionic Bonding. Ionatoms that has an electrical charge Ion: any atom or group of atoms that has an electrical charge. Since protons and neutrons.

IPC Notes Ionic Compound Names & Formulas. Remember… ions - atoms that have a positive or negative charge Oxidation number – the charge that an ion has.

Naming ionic compounds

Ionic Bonding & Covalent Bonding. Ionic Bonding Ionic Bonding – TRANSFER of electrons Metals + Nonmetals = Ionic Bond.

How to draw atoms ParticleChargeMass Proton Electron Neutron An atom is the smallest part of an element /2000.

18 Bohr Models Lesson 3.1 Extension. Element Name: _______________________ Chemical Symbol: _______Atomic Number: _______ Diagram the Bohr atom which.

Ions & Compounds. Ions atoms that have lost or gained electrons do this to get a stable outer shell (8) they now have a charge.

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.

Chemical Formulas. Molecules and Compounds 4 A molecule is two or more atoms that are bonded together. –H 2, O 2, N 2, H 2 O, CO 2 4 A compound is two.

Periodic Table of the Elements. Select an element = Internet link ()

Ionic Bonds & Ionic Compounds Types of ions – Monatomic ions - ions formed from a single atom. Ca 2+, K +, Al 3+, Cu +, Cu 2+, Fe 2+, Fe 3+, Cl -, O 2-,

8.2 Ionic Bonding. Ionic Bonds Ionic bonds are made between metal and non-metal atoms Electrons are transferred from the metal atom to the non-metal atom.

Ions. Atoms are neutral. BUT when an atom gains or loses an electron it becomes an ion. Ions can be positive or negative.

1) Bell Ringer: What are valence electrons? What is the difference between an ionic and molecular compound? 2) Worksheet #13 3) QUIZ #6.

Rules For Writing Chemical Formulas and Naming Compounds IPC 2007.

Writing Ionic Formulas Calcium Chloride Locate the metal on the periodic table and write the element symbol with its oxidation number. Ca +2.

Formation of compounds

 atoms that are now stable because they have gained or lost valence electrons resulting a positively or negatively charged atom.

How to Hold it Together Ionic Bonds Ch. 5, Sec. 2.

Writing Chemical Formulas When you combine atoms, you use the oxidation numbers to help you figure out the ratio Oxidation Number.

Disodium phosphate Sodium chloride

Examples: Ions and Atomic Symbol Notation. Example Determine the charge of the following ion. Chlorine gains one electron.

Criss-cross notes. Criss-Cross Method Criss-cross is a _________ to help you find chemical __________ when you _________ atoms. shortcut formulas combine.

Writing Formulas Oxidation Numbers & Chemical Formulas Mrs. Wolfe.

Compound Names and Formulas

Essential Question: How do you determine the formula for an ionic compound?

Standard 3.1 Ionic Compounds. Formation of ionic compounds Ionic compounds form when oppositely charged cations and anions are attracted to one another.

Intro to Names and Formulas for Ionic Compounds November 2, 2015.

Making Molecules (aka…combining capacity). Atoms combine to form molecules based on the electrons in their outer shell. We saw from Bohr Diagrams that.

Combining Elements How Chemical Compounds Are Made.

Ionic Bonds and Compounds. The Octet Rule The Octet rule states that elements gain or lose electrons to attain an electron configuration of the nearest.

Compounds Chapter 3.1 A molecule is a group of atoms in which the atoms are bond together by 1 or more pairs of electrons.

IONIC & COVALENT BONDING

CHEMISTRY PART 6 Ionic Compounds Charges of transition metals will be given in the periodic table as their formation is complicated.

Click on “Slide Show” Click on “From Current Slide” Or “From Beginning”

© 2014 Pearson Education, Inc. Chapter 6 Lecture Basic Chemistry Fourth Edition 6.2 Writing Formulas and Naming Ionic Compounds Learning Goal Using charge.

Atoms with a charge. Ion: any atom that has a net electric charge; not neutral If the atom is not neutral, then there must be a different number of protons.

 What do we use roman numerals for in everyday life?  Name what the letters in roman numerals stand for (I, V, X, etc.)  What can chemical formulas.

Naming Ionic Compounds. Rules Name the metallic ion (cation) 1 st (whole name) Name the nonmetallic ion (anion) 2 nd, but change the ending to “ide” The.

Chemical Bonding.

Naming Compounds and Writing Formulas

This is Neon. He is a stable atom. This makes him happy!

Q 2 Create a list of ways you can quickly predict whether two elements will create an ionic bond. What are chemical formulas and why are they useful? Write.

Ions and the Octet Rule.

Chapter 6 Ionic and Molecular Compounds

How Atoms Combine Part 2.

Lesson 20: Getting Connected

Ionic bonding Day #2.

5. Formulas and Names of Ionic Compounds

How to Make Ionic Bonds.

Forming Ionic Bonds When atom gains or loses electrons, it becomes a charged ion. The charge on the ion explains how many electrons an atom has gained.

Chemical Formulas Ex) NH3 Formulas express the types and numbers of

Formula and Naming of Ionic Compounds

Presentation transcript:

Writing Formulas Oxidation Numbers & Chemical Formulas Mrs. Wolfe

Review: How do you figure out the charge of an ion? What is the charge of Sodium? +1 Another word for Charge is OXIDATION NUMBER. + -

Is there a pattern of Oxidation Numbers on the Periodic Table? Time for a Worksheet: “Discovering Oxidation Numbers”!

± Write the pattern in your notes!

There is a pattern of ions! METALS ARE POSITIVE! NONMETALS ARE NEGATIVE!

Practice Problems… What is the oxidation number of Aluminum? +3 What is the oxidation number of Iodine? Time for a worksheet: Oxidation Numbers

Writing Formulas Consider the formula BeCl 2 How many atoms of Beryllium are in that compound? 1 How many atoms of Chlorine? 2 WHY?

BeCl 2 Be 2 Cl 7 7

Cl -1 BeCl 2 Be +2 Cl -1 Be +2

Lithium & Fluorine What is the oxidation number for Lithium? +1 Fluorine? So how many atoms do you need of each element to make a compound? One of each! The formula is… LiF F -1 Li +1

LiF not FLi…why? You always write the METAL FIRST in a formula. Let’s try another one. Try to write a formula for Magnesium & Sulfur. MgS S -2 Mg +2

How about Magnesium + Chlorine? Magnesium’s oxidation # +2 Chlorine’s oxidation # Cl -1 Mg +2 Cl -1 MgCl 2 Time for some practice with Formula Writing!