Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory...
Transcript of Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory...
![Page 1: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/1.jpg)
Unit: Chemistry
Lesson 1: Introduction to Atoms
Essential Questions:1.) How did atomic theory develop?2.) What is the modern model of the atom?
![Page 2: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/2.jpg)
How did atomic theory develop?
Atomos “uncuttable”
The smallest particle Atom
of an element
![Page 3: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/3.jpg)
Dalton
Atoms cannot be broken into smaller pieces
Dalton thought that atoms were like hard balls that could not be broken.
![Page 4: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/4.jpg)
Dalton’s Model.
![Page 5: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/5.jpg)
Thomson Atoms are made of smaller parts
Negatively charged particles Electron
in an atom
Atoms contain a positive charge
An atom has electrons scattered throughout it like seeds in a watermelon.
![Page 6: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/6.jpg)
Thomson’s ModelThomson suggested that atoms had negatively charged electrons set in a positive sphere. Each electron is represented by the symbol e−.
![Page 7: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/7.jpg)
Rutherford
An atom is mostly empty space with a positive center
The center of an atom Nucleus
Positively charged particles Protons
in an atom’s nucleus
The pit models the nucleus of an atom and the fruit is the space with electrons.
![Page 8: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/8.jpg)
Rutherford’s ModelAccording to Rutherford’s model, an atom was mostly open space. The “6+” in the model means that there are six protons in the nucleus.
![Page 9: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/9.jpg)
Bohr
Electrons are found in specific orbits
![Page 10: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/10.jpg)
Cloud Model
Electrons move within a cloudlike region
The amount of energy Energy level
an electron has
![Page 11: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/11.jpg)
Modern Model of the Atom
Particles in the nucleus Neutron
with no electrical charge
An atom has a nucleus made of positively charged protons and neutral neutrons. The nucleus is surrounded by a cloud of negatively charged electrons.
![Page 12: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/12.jpg)
Modern Model of an AtomA carbon atom has a nucleus made up of positively charged protons and neutral neutrons. The nucleus is surrounded by a cloud of negatively charged electrons.
![Page 13: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/13.jpg)
Particle Charges
Number of protons = number of electrons
![Page 14: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/14.jpg)
Particle Masses
Protons and neutrons make up most of the mass
![Page 15: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/15.jpg)
The number of protons Atomic Number
in the nucleus
![Page 16: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/16.jpg)
Atoms with the same Isotopes
number of protons and
different numbers of
neutrons
The sum of the protons Mass number
and neutrons in the atom
![Page 17: Unit: Chemistry Lesson 1: Introduction to Atoms Essential Questions: 1.) How did atomic theory develop? 2.) What is the modern model of the atom?](https://reader036.fdocument.pub/reader036/viewer/2022081520/5697bfe91a28abf838cb6d8f/html5/thumbnails/17.jpg)
Isotopes of CarbonAll isotopes of carbon contain 6 protons. They differ in the number of neutrons. What is the missing information for each isotope?