Early Atomic Theory and Structure Chapter 5 Outline I.Models of the Atom A.Dalton’s Atomic Theory B.Thomson’s Plum-Pudding Model C.Rutherford’s Gold Foil.

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Presentation transcript:

Early Atomic Theory and Structure Chapter 5 Outline I.Models of the Atom A.Dalton’s Atomic Theory B.Thomson’s Plum-Pudding Model C.Rutherford’s Gold Foil Experiment D.Nuclear Model of the Atom II.Subatomic particles A.Electrons B.Protons C.Neutrons III.Atomic Notation IV.Isotopes V.Atomic Mass

Dalton’s Atomic Theory Elements (matter) is composed of small, indivisible particles called atoms. Atoms of a given element are identical in mass and behavior. Atoms of different elements differ in mass and behavior. Chemical combination of elements to make different substances occurs when atoms join together in small whole number ratios. Chemical reactions only rearrange the way the atoms are combined; the atoms themselves are not changed.

How do charges interact?

What does Crookes’ tube tell us about cathode rays?

What does the gold foil experiment show us about the structure of the atom?

How does the Plum Pudding Model differ from the Nuclear Model of the atom?

How are the subatomic particles distributed in the atom?

Example – Atomic Notation Thallium-201, Tl-201, is used for heart imaging. A)What is the mass number? B)What is the atomic number? C)How many protons are there? D)How many neutrons are there? E)How many electrons are there?

Example – Atomic Notation Thallium-201, Tl-201, is used for heart imaging. A)What is the mass number? B)What is the atomic number? C)How many protons are there? D)How many neutrons are there? E)How many electrons are there?

Example – Atomic Notation Thallium-201, Tl-201, is used for heart imaging. A)What is the mass number? B)What is the atomic number? C)How many protons are there? D)How many neutrons are there? E)How many electrons are there?

Example – Atomic Notation Thallium-201, Tl-201, is used for heart imaging. A)What is the mass number? B)What is the atomic number? C)How many protons are there? D)How many neutrons are there? E)How many electrons are there?

Example – Atomic Notation Thallium-201, Tl-201, is used for heart imaging. A)What is the mass number? B)What is the atomic number? C)How many protons are there? D)How many neutrons are there? E)How many electrons are there?

Example – Chemical Symbols What is the atomic notation for an atom that has 15 protons, 16 neutrons, and 18 electrons?

Example – Elements What element is represented by: A)Manganese, Mn B)Zinc, Zn C)Terbium, Tb D)Tin, Sn E)Mercury, Hg

21 Isotopes of Magnesium In naturally occurring magnesium, there are three isotopes: Basic Chemistry Copyright © 2011 Pearson Education, Inc.

1H1H 2H2H 3H3H

Example - Isotopes of Neon What is the atomic mass of neon?

Example – Atomic Mass Lithium has two isotopes: lithium-6 at 7.420% and lithium-7 at 92.58%. If the atomic mass of lithium is amu and the mass of lithium-6 is amu, what is the mass of lithium-7?