Dot-and-cross diagram

Slides:

Advertisements

Similar presentations

Ionic Compounds and Metals

Advertisements

Chapter 7 Ionic Compounds and Metals

1 Chapter 4 Compounds and Their Bonds 4.2 Ionic Compounds Copyright © 2009 by Pearson Education, Inc.

Identify the elements present in each of the following compounds and the number of each element atom present. Common salt: NaCl Nitric acid:

General, Organic, and Biological Chemistry Fourth Edition Karen Timberlake 5.2 Ionic Compounds Chapter 5 Compounds and Their Bonds © 2013 Pearson Education,

Ionic and Covalent bonding. Bonds All atoms are trying to get enough electrons so that their valence shell is full. All atoms are trying to get enough.

After today, you will be able to… Write formulas for ionic compounds Explain what an empirical formula is List and explain the properties of ionic bonds.

Ionic Bonding Section 4.1.

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

1 Type of bonds ___________ formed by sharing of electrons between atoms of non-metals ___________ electrostatic attraction between positive ions and negative.

CHAPTER 6 Ionic Bonding © 2013 Marshall Cavendish International (Singapore) Private Limited.

CHEMISTRY October 19th, 2011.

27/08/2015 Ionic bonding This is where a metal bonds with a non-metal. The metal atom donates one or more electrons to the non-metal. For example, consider.

Chemical Bonds Ionic Bonds.

Ionic Bonds and Ionic Compounds

Understanding chemical reactions

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

Chemical 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.

Ionic and Covalent Bonds. Two or more elements chemically combined. Compound.

Chapter 2: Sections 3 Ionic Bonds What is an Ion? An atom or group of atoms that has become electrically charged An atom or group of atoms that has become.

1. Neutron A. The number of protons in an atom. 2. Proton B. Hold the electrons around the nucleus. 3. Electron C. The number of protons plus neutrons.

Warm-Up #32 A. 34 Copy and Answer 1.How many valence electrons does calcium have? 2.If calcium lost two electrons, what would be its charge? 3.How many.

Positively charged ions and negatively charged ions are attracted to each other and this attraction is the basis of ionic bonding.

IONIC BONDING. What is an ion?  An ion: an atom or bonded group of atoms with a positive or negative charge Cation: A positively charged ion Cation:

Chemical Bonding Chapter 12. Objectives O SPI Identify the common outcome of all chemical changes O SPI Use the periodic table to determine.

Chapter 6 Chemical Bonding.

Ionic Bonds. How Bonds Form Electrons are transferred from a metal to a nonmetal. Ex: NaCl, CaI 2, Fe 2 O 3 -metals form cations (+) (gives away electrons)

Chemical Bonding.

Ionic Bonds January 5, th grade Chapter 4.2.

Ionic Bonds Formed by a transfer of electrons Bonds between metal + oxygen are called oxides Bonds between metal + non-metal (except oxygen) are called.

4.1 Ionic Bonding & Structure

Ionic Bonding. What makes an atom most stable? Electron configuration – Electron configuration – When the highest occupied energy level is filled with.

Ionic Bonding. Chemical bond-the attractive force that holds atoms of ions together What was an ion? How are they formed? Ionic Bond- a bond formed between.

Flashcards for Ionic & Metallic Bonding. What particle is transferred in ionic bonding? Electron.

Chemical Bonding. Basic Atom Information Atoms are neutral Atoms are the smallest particles of an element Elements are arranged on the table by increasing.

What is the bonding in sodium chloride like?

IGCSE CHEMISTRY LESSON 3.2. Section 1 Principles of Chemistry a)States of matter b)Atoms c)Atomic structure d)Relative formula mass e)Chemical formulae.

Chemical Bonding Atoms in combination. Basics of Bonding There are 3 main types of bonding that we will look at in this PowerPoint All bonding is due.

BONDING. WHY ATOMS COMBINE -1 All atoms want a full outer shell Some atoms will lose electrons to empty their shells These become positively charged ions.

Ionic Bonding Anions and cations are held together by opposite charges. Ionic compounds are called salts. Simplest ratio of elements in an ionic compound.

1. 2 Objectives Identify the stable noble gas structure. Explain the formation of ionic and covalent bonds. State the properties of ionic and covalent.

Chemical Formulas Uses chemical symbols to represent the atoms of the elements and their ratios in a chemical compound Example: CO 2.

Group-6.  An ion is an atom or group of atoms that have a net electrical charge. An ion is formed when electrons or protons are gained or lost by an.

Ionic substances C2.1/2 10-Jul-11. Metal + Non-metal Metal atoms Non-metal atoms + ions– ions electrons Ionic compound Atoms get full outer shells.

Ionic Bonding Noadswood Science, 2012.

Aim: What properties do Ionic Compounds have?

Chapter 7 Ionic and Metallic Bonding 7.2 Ionic Bonds and

C2 Topic 2: Ionic Bonding This topic looks at:

Chemical Bonding.

Unit: Chemical Bonding

Binary Ionic Compounds

After today, you will be able to…

Chemical Formula Tells the relative number of atoms of each element in a compound Molecular: (covalent bonding) Formula represents the number of atoms.

Chemical Bonding.

NC Standards Students know atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic.

“Ionic and Metallic Bonding”

C2 Topic 2: Ionic Bonding This topic looks at:

TOPIC 5 CHEMICAL BONDS By: School of Allied Health Sciences

NC Standards Students know atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic.

Describe how an ionic bond is formed, including bond diagrams

תרכובות יוניות Ionic compounds

Presentation transcript:

Dot-and-cross diagram Chemistry 5072 Dot-and-cross diagram

Ionic bonding Hence the ionic bond is an electrostatic force

Ionic bonding Ionic bonds are formed between atoms of metals and atoms of non-metals, as a result of the transfer of electrons. Compounds formed by ionic bonding are called ionic compounds. Metals react with non-metals to form ionic compounds. Note : The particles present in ionic compounds are ions; there are NO molecules in ionic compounds.

More Practice 1. Draw ‘dot and cross’ digrams to show the formation of : Calcium oxide Magnesium chloride 2. Draw ‘dot and cross’ diagram to show the bonding in Sodium oxide

Calcium oxide (CaO) 2+ 2- x transfer of 1 electron x x x x x x x x x x 2,6 O atom Ca atom 2,8,8,2 x x 2+ 2- x x x x x x x x x x x x x x x x x x O2- ion Ca2+ ion Ionic bond (electrostatic force) 2,8 2,8,8

Calcium oxide (CaO) Ca O 2+ 2- Ca O x transfer of 1 electron Note: only valence shells are shown x O atom 2,6 Ca atom 2,8,8,2 x x 2+ 2- x x x Ca x x O x x x Ca2+ ion Ionic bond (electrostatic force) O2- ion 2,8 2,8,8

2 Magnesium chloride MgCl2 transfer of 1 electron x x x x x x x x Cl atoms x x x 2,8,7 x Mg atom transfer of 1 electron 2,8,2 ¯ x x 2+ 2 x x x x x x x x x Mg2+ ion 2,8 2,8,8 2 Cl¯ ions

2 Cl Mg Cl Mg Cl Magnesium chloride MgCl2 transfer of 1 electron x Cl atoms 2,8,7 x Mg atom transfer of 1 electron Cl 2,8,2 2+ ¯ x x 2 Note: only valence shells are shown x Mg x x Cl x x x x Mg2+ ion 2,8 2,8,8 2 Cl¯ ions

Chemical formulae of ionic compounds An easy method of writing a chemical formula involving 2 ions is to ‘criss-cross’ the charges Eg. Write the formula of aluminium oxide. Ions: Al3+ O2- Chemical formula: Al2O3 Check that the total positive charge and total negative charge are equal

Chemical formulae of ionic compounds Write the formula of magnesium carbonate. Ions: Mg2+ CO3 2- Chemical formula: MgCO3 Check that the total charges are balanced. All subscripts are in the simplest set of whole numbers

Chemical formulae of ionic compounds Write the formula of calcium nitrate. Ions: Ca2+ NO3 - Chemical formula: Ca(NO3)2 Check that the total charges are balanced. subscript ‘1’ is not written Polyatomic ions should be written within brackets if there is a subscript attached

Properties of ionic compounds Physical properties: High melting and boiling points Usually soluble in water Low volatility Conducts electricity only in molten or aqueous state