ATOMS Structure & Properties 1.Atomic structure 2.Periodic table 3.Problem of atomic spectra.

Slides:

Advertisements

Similar presentations

The atom and its nucleus

Advertisements

Atoms Chapter 2, Section 1.

Structure of an Atom.

The Structure of the Atom

The structure of the atom

Chapter 5 Sections 2 and 3 Structure of an atom nucleus- center of an atom -discovered by Ernest Rutherford in 1911 proton (p+) -positively charged subatomic.

The Atom. Matter Is anything that has weight and takes up space. Is anything that has weight and takes up space. All matter is made of atoms. All matter.

Dual Nature of Light. Light Quanta. Photoelectric Effect.

Atoms, Molecules and Ions Chapter 2. Atomic Theory of Matter The theory that atoms are the fundamental building blocks of matter reemerged in the early.

STD 1: Atomic Structure.

Atomic Structure.

Chemistry 11 Early Models of the Atom. Ancient Greeks were the first to come up with the idea of atoms. Democritus Democritus suggested that all matter.

The Periodic Table. Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus.

Atomic Physics.

Development of the Atomic Theory

Atomic Structure.  Describe the experiments of Thomson and Rutherford explain how they contributed to our present understanding of atomic structure.

 The atoms of all elements are made up of a central nucleus with orbiting electrons. ◦ A nucleus is made up of positively charged PROTONS and neutral.

Unit 3 Language of Chemistry Part 1 Zumdahl: Chapter 4 Holt: Chapter 3.

11 Atomic Theory. 2 A HISTORY OF THE STRUCTURE OF THE ATOM.

Chapter 4: Discovery of Atomic Structure. Prentice Hall © 2003Chapter 2 The Discovery of Atomic Structure An ancient Greek named Democritus was the first.

Atoms and Their Structure Chapter 4. Atoms Elements are made of particles called atoms Atoms are the smallest pieces of matter that contain all the properties.

The History of Atomic Structure

The Parts of an Atom.

Matter & The Atom. Matter  The term matter describes all of the physical substances around us  Anything that has mass and volume (takes up space) 

Unit 2 Atomic Theory. An atom is… The smallest particle into which an element can be divided. “Building block of matter”

Atoms and the Periodic Table. What is an atom?  The Basic Building Block of matter.

The Atom 1.Parts of the atom 2.How to draw an atom.

TEK 8.5 Matter and energy. The student knows that matter is composed of atoms and has chemical and physical properties.

Light and Atoms Physics 113 Goderya Chapter(s): 7 Learning Outcomes:

Atomic Physics What is the ATOM???. MATTER = ATOM All matter is composed of atoms. Atoms are the smallest part of an element that keeps that element’s.

What is an atom??? An atom is the smallest particle of an element that retains its identity in a chemical reaction.

History of the Atom. Aristotle 400 BC believed there were four elements Earth, Wind, Fire and Water.

Atomic Structure A level At The Sixth Form College Colchester.

Exploring Inner Space TEKS 8.5A describe the structure of atoms including the masses, electrical charges and locations, of protons and neutrons in the.

Development of Atomic Theory Ancient Times | Dalton's Postulates | Thomson's Discovery of Electron Properties | Rutherford's Nuclear Atom | Bohr's Nuclear.

Chapter 2: The Chemistry of Life

Rev 6/7/ BC Atomic Model Development.

– a unit of matter; the smallest unit of a chemical element.

Review of Atomic Theory History. Structure of an Atom A carbon atom consists of protons and neutrons in a nucleus that is surrounded by electrons. - Introduction.

Periodic Table of Elements

Describe the mass, charge, and location of protons, neutrons, and electrons in atoms. S-105.

PROTON Proton: the positively charged particle found in the nucleus of an atom.

The Atomic Structure. What is inside atoms?. The Atomic Structure  Thomson (1897) proved that the fundamental particles in all atoms are called electrons.

The Atomic Theory Democritus Dalton 440 B.C. – Thought matter was made of tiny particles – Believed these particles could not be cut into anything smaller.

BELLRINGER 10/2/14 What are the three particles that make up the atom?

Atomic Structure Chapter 4. Dalton’s Atomic Theory 4.1 John Dalton – 18 th century All matter is composed of atoms All atoms of a given element are identical.

ATOMS: The Building Blocks of Matter Objectives 1.Law of conservation of mass 2.Law of definite proportions 3.Law of multiple proportions 4.Dalton’s Atomic.

History of Atoms By: Layan Suleiman 7A.

Atoms Atom- the smallest part of an element Atoms of one element are different from another element. contains protons, electrons, and neutrons Atomic Mass.

Journal #20 1. Who discovered the electron? 2. What did Rutherford discover?

Structure of an Atom. The Three subatomic particles of an atom: Proton Neutron Electron.

Matter & The Atom. Matter The term matter describes all of the physical substances around us: your table, your body, a pencil, water, and so forth.

Unit 3: The Atom. Atoms All matter is made of very tiny particles All matter is made of very tiny particles These particles have the same properties as.

WHAT IS CHEMISTRY? The study of the properties of matter and how matter changes.

Atomic Mass. Each element found on the periodic table of elements is given an atomic mass The atomic mass tells you the average mass of the atoms of an.

There are three states of matter: gas, solid and liquid All matter is made of atoms An element is made up of one type of atom A molecule is a combination.

Chemistry Chapter 4 Notes #1 09/10/10. Democritus Matter is composed of empty space where atoms move Atoms are solid, homogenous, indivisible, and indestructible.

The Atom, Periodic Table, and Chemical Reactions Mrs. Hooks Unit 3.

The Atom What defines the property of a substance.

Atomic Structure Notes. Thomson Model The “pudding” had a positive charge and the “plums” had a negative charge.

ATOMIC THEORY. WHAT IS AN ATOM? What makes the elements on the Periodic Table different from each other? What is the name for the center of an atom? What.

Greek Philosop hers Dalton’ s Atomic Theory How atoms differ Radioac tivity Types of radiatio n The atom Subatomic.

{ Atom and Isotope Review Physical Science. An atom has 6 protons, 8 neutrons, and 6 electrons. What is the atomic mass?

The Structure of the Atom Chemistry – Chapter 4. Early Theories of Matter Philosophers ◦ Democritus was first to propose Atomic Theory:  Matter composed.

1 UNIT 2 Atoms, Molecules, and Ions. 2 The Power of 10 nceopticsu/powersof10/

Atomic Structure. What are the 3 major parts of an atom? Proton Neutron Electron.

The Atomic Theory The smallest particle of an element that can enter into chemical change. 2. Building block of all matter. 3. Consists of a central nucleus.

Atomic Structure.

Atoms,and Elements Atoms.

Presentation transcript:

ATOMS Structure & Properties 1.Atomic structure 2.Periodic table 3.Problem of atomic spectra

Democritus 4 th Century B.C. Atoms as elementary blocks of matter Thomson discovers electron (1900) -> Plum Pudding Model of atom (a guess) Plums (electrons) = negative electric charge centers Pudding = positive electric charge Rutherford (1911) Atoms as small nucleus of positive charge, surrounded by orbiting electrons

Rutherford’s experiment Plum Pudding Model Nuclear Model Note: Nucleus later found to be composed of protons (positive charge particles) and neutrons (electrically neutral particles)

Properties of atoms # electrons = # protons (electrical neutrality) # electrons determines chemical properties Hydrogen –>1 electron Z=1 Helium –> 2 electrons Z=2 Lithium –> 3 electrons Z=3 …… Uranium –> 92 electronsZ=92 92 natural `elements’ Explains the Periodic Table of Chemistry

Trouble with Rutherford’s Model! Electron always accelerating Accelerating charge radiates light (Maxwell) Electron would lose its energy, spiralling into nucleus -> atoms unstable Also, radiated light from an atom would have all wavelengths (colors) But real atoms emit/absorb light of a few discrete wavelengths E.g. Balmer lines of Hydrogen