Science Starter: Black Boxes Groups of 2: Manipulate the box so the marble moves around the fixed object inside of the box. DO NOT OPEN THE BOX Discuss.

Slides:

Advertisements

Similar presentations

Atomic Structure Modern Atomic Theory  All matter is composed of atoms  Atoms cannot be subdivided, created, or destroyed in ordinary.

Advertisements

Chapter 5 “Atomic Structure”

 All matter is composed of atoms  Atoms cannot be subdivided, created, or destroyed in ordinary chemical reactions. However, these changes CAN occur.

Atomic Structure.

Chapter 4 “Atomic Structure”

Chapter 4 “Atomic Structure”

“Atomic Structure”. The Greek philosopher Democritus (460 B.C. – 370 B.C.) The Greek philosopher Democritus (460 B.C. – 370 B.C.) He believed that atoms.

Chapter 4 “Atomic Structure”

STD 1: Atomic Structure.

Atomic Structure Expectations.

Unit Six: Atomic structure

Chapter 4 “Atomic Structure”

“Atomic Structure” Essential Question: Describe how the model of the atom has changed since the Greek idea of “Atomos”

Chapter 4 “Atomic Structure” Pre-AP Chemistry Charles Page High School Stephen L. Cotton.

Unit 1 – Atomic Structure

Chemistry Chapter 3 Atoms: The Building Blocks of Matter.

Chemistry Chapter 1 Atoms: The Building Blocks of Matter.

Chemistry Atoms: The Building Blocks of Matter Dalton’s Atomic Theory (1808)  Atoms cannot be subdivided, created, or destroyed  Atoms of different.

Unit 1 – Atomic Structure Bravo – 15,000 kilotons.

Unit 1 – Atomic Structure Bravo – 15,000 kilotons.

Chapter 4 “Atomic Structure”

Atomic Theory 15,000 kilotons.  Dismissed idea of the atom. Early Greeks Two schools of thought:  Matter is made of indestructible particles called.

Unit 1 – Atomic Structure Bravo – 15,000 kilotons.

Atomic Structure Modern Atomic Theory  All matter is composed of atoms  Atoms cannot be subdivided, created, or destroyed in ordinary.

The Structure of the Atom

Unit 3 – Atomic Structure Bravo – 15,000 kilotons.

Rutherford’s experiment Day 2. Last time Discussion of early atomic model- the plum pudding model To refresh your memory: – Large slightly positive mass.

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

Chapter 4 Atomic Structure p Section 4.1 Defining the Atom Greek philosopher Democritus Greek philosopher Democritus suggested atoms (Greek “atomos”)

Chapter 4 Atomic Structure.

Unit 1 – Atomic Structure Bravo – 15,000 kilotons.

Unit 3 “The Structure of the Atom”

Chapter 4 “Atomic Structure”. Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence of.

Atomic Structure Standards Standards.

Unit 3 History of the Atom.

Chapter 4 Atomic Structure Theories about matter were based on the ideas of Greek philosophers: Democritus (400 B.C. ) – coins the term “atom” saying.

Atomic Structure Section 4-1 Greek Philosophers (cont.) Many ancient scholars believed matter was composed of such things as earth,

Chapter 4 “Atomic Structure”. #1. I can determine the symbol of the first 20 elements on the periodic table from their name and vice-versa.

“Atomic Theory” Pre-AP Chemistry. Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the existence.

“Atomic Structure” TARGET Use the periodic table to determine the number of subatomic particles and average atomic mass. Use the periodic table to determine.

Chapter 4 “Atomic Structure”. Section 4.1 Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among the first to suggest the.

Chapter 4 “Atomic Structure” Pre-AP Chemistry Charles Page High School Stephen L. Cotton.

Chapter 4 “Atomic Structure”. Section 4.1 Defining the Atom OBJECTIVES: OBJECTIVES: Describe Democritus’s ideas about atoms. Describe Democritus’s ideas.

Atomic Structure Chemistry. Defining the Atom The Greek philosopher Democritus (460 B.C. – 370 B.C.) was among first to suggest the existence of atoms.

Chemistry Chapter 3 Unit 4

Atomic Structure

Atomic structure chp 3 sec 2

“Atomic Structure” Pre-AP Chemistry.

Unit 3 – Atomic Structure

Ch. 4: Introduction to Atoms

Chapter 4 The Structure of the Atom

Atomic Structure

Chapter 4 “Atomic Structure”

History of the Atomic Model 2.1

Atomic Structure

Pre-AP Chemistry Atoms: The Building Blocks of Matter.

The Structure of the Atom

History of the Atomic Model 2.1

History of the Atomic Model 2.1

Atomic Structure

History of the Atomic Model 2.1

Unit 1 – Atomic Structure

Chapter 4 Atomic Structure and Theory

Unit 1 – Atomic Structure

Chapter 4 “Atomic Structure” Charles Page High School

Atomic Structure N5.

Atomic Structure N5.

Presentation transcript:

Science Starter: Black Boxes Groups of 2: Manipulate the box so the marble moves around the fixed object inside of the box. DO NOT OPEN THE BOX Discuss what the object in the box might look like. On the science starter page, sketch the object in the box, showing its size, shape and location within the box. Time for Activity: 10 minutes

Thomson’s Atomic Model Thomson: electrons were like plums embedded in a positively charged “pudding” the “plum pudding” model J. J. Thomson

Ernest Rutherford’s Gold Foil Experiment  Alpha particles (helium nuclei) were fired at a thin sheet of gold foil  Particles that hit on the detecting screen (film) are recorded

Rutherford’s Findings a) The nucleus is small b) It is dense c) It is positively charged  Most of the particles passed right through  A few particles were deflected  VERY FEW were greatly deflected “Like howitzer shells bouncing off of tissue paper!” Conclusions:

The Rutherford Atomic Model Based on his experimental evidence: –The atom is mostly empty space –All the positive charge, and almost all the mass, is in the center “nucleus” –The nucleus is composed of protons and neutrons –The electrons are distributed around the nucleus and occupy most of the volume “nuclear model”

Section 4.3 Distinguishing Among Atoms

Atomic Number Atoms are composed of identical protons, neutrons, and electrons Elements are different because they contain different numbers of PROTONS The “atomic number” of an element is the number of protons in the nucleus # protons in an atom = # electrons

Element # of protons Atomic # (Z) Carbon66 Phosphorus1515 Gold7979 Look at the periodic table to confirm these numbers

Mass Number Mass number is the number of protons and neutrons in the nucleus of an isotope: Mass # = p + + n 0 Nuclide p+p+p+p+ n0n0n0n0 e-e-e-e- Mass # Oxygen Arsenic Phosphorus This mass # may not match the mass # on the periodic table

Complete Symbols Include the symbol of the element, the mass number and the atomic number. X Mass number Atomic number Subscript → Superscript →

Symbols n Find each of these: a) number of protons b) number of neutrons c) number of electrons d) Atomic number e) Mass Number Br 80 35