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How to do it… Step One: The Octet (8) rule…Atoms will gain or lose electrons to have a total of 8 electrons in their outer shell.
Complete Outer Shell Once the atom gains or loses electrons it is stable because it has a complete outer shell. Which group of elements is stable (non-reactive)?
Noble Gases Atoms will gain or lose electrons to become like the nearest noble gas.
Making Ions Remember an electron has a negative charge If and an atom gains electrons it becomes negative by the amount of electrons it gains Gain 1 electron and become -1
Making Ions Remember an electron has a negative charge If an atom loses electrons it becomes positive by the amount of electrons it loses Lose 1 electron and become +1
Exceptions to the Octet The elements that are close to the noble gas Helium need to get 2 electrons in the outer shell, not 8. Example: Lithium
Practice Game Round… Make the ion for Lithium… How many electrons in the outer shell? Nearest Noble gas? Will it gain or lose electrons and how many?
Answer Li + or Li +1
1 What is the ion for Oxygen?
2 What is the ion for Sodium?
3 What is the ion for Flourine?
4 What is the ion for Magnesium?
5 What is the ion for Nitrogen?
6 What is the ion for H?
7 What is the ion for Argon?
Does not make an ion
8 What is the ion for Sulfur?
9 What is the ion for Phosphorus?
10 What is the ion for Neon?
Does not make an ion
11 Do groups 1 and 2 of the periodic table become positive or negative ions?
12 Does group 8 of the periodic table become a positive or negative ion?
No ion, noble gases
13 Do groups 6 and 7 lose or gain electrons when they become ions?
14 How does group number relate to electrons in the outer shell?
15 What is the octet rule? A) Each atom wants to get 8 protons in the outer shell B) Each atom wants to be like the closest noble gas C) Each atom wants to become unstable D) Each atom wants equal numbers of protons and electrons
16 Give the name of an element that can give the right number of electrons to Chlorine. Hint: How many electrons does chlorine want?
Any Group 1 element
17 Give the name of an element that can give Oxygen the right number of electrons. Hint: How many electrons does Oxygen want?
Any group number 2
18 Name an element that can take the right number of electrons from Beryllium
Any group number 6 element
19 Name an element that can take the right number of electrons from Sodium
Any group number 7 element
20 What type of bonding occurs when one atom takes electrons from another?
21 What type of bonding occurs when atoms share electrons?
22 Name an atom that will form and ionic bond with Lithium
Any group 7 element
23 Why don’t noble gases form ionic bonds?
Complete outer shell
24 Name an element that will form an ionic bond with Oxygen
Any group 2 element
25 Name an element that would require 2 atoms to form an ionic bond with Sulfur
Any group 1 element
Lecture 1.1 Refresh your high school chemistry CS882, Fall 2006.
Atom Stability * In order for atoms to be stable, they need to have their outer energy level completely filled. * In most cases, atoms need to have 8 valence.
Ions Atoms that are not neutral. Atoms Are Neutral Let’s review: Why are atoms neutral? –Because they have equal numbers of protons and electrons. Li.
Chemical Bonding Leyda 2012.
Ionic and Covalent Bonding
Elements and Life Basic chem. review. Elements and Compounds Organisms are made of Matter. Which is composed of elements. An element is a substance that.
1 Chapter 4 Compounds and Their Bonds 4.1 Octet Rule and Ions Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings.
Ch. 7: Ionic Compounds & Metals
1 Chapter 4 Compounds and Their Bonds 4.1 Octet Rule and Ions Copyright © 2009 by Pearson Education, Inc.
Ions and Ionic bonding Chemistry. What’s in an atom? (review and new Info) Atoms are made up of 3 particles: 1.Protons -Located in the nucleus (center.
The Periodic Table & Formation of Ions
Ionic and Covalent Bonding. » Atoms bond when their valence electrons interact ˃Atoms with full outermost energy levels are not reactive (Noble Gases)
Ionic Bonding & Covalent Bonding. Ionic Bonding Ionic Bonding – TRANSFER of electrons Metals + Nonmetals = Ionic Bond.
Why are nitrogen and phosphorus both in group 5?
Atomic Structure. Rules Of Atomic Structure 1.The Number of electrons = number of protons 2.Atomic Number = the number of protons/electrons 3.Atomic Mass.
Compounds 2 Ionic Compounds. Ionic compounds: When atoms lose or gain electrons to form ions. Protons are _____________ charged Electrons are _______________.
18 Bohr Models Lesson 3.1 Extension. Element Name: _______________________ Chemical Symbol: _______Atomic Number: _______ Diagram the Bohr atom which.
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