Lesson2powerpoint - Some Important Points to Note about...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Some Important Points to Note about CHEM 102B Homework on Assignments handout means OnlineHomework (Lon Capa) Homework 1 due Tuesday, Jan 25, 9a.m. Problems listed on Assignments handouts from text must be done because some of these problems will reappear on your quizzes. Chemistry is NOT a spectator subject; the more problems you attempt; the better grade you will get! Worksheets on course worksheet must be completed before attending the discussion so you can get assistance with any problems you do not understand at the discussion section. Someof theworksheet problems will also reappear on quizzes.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
ATOMS, MOLECULES AND IONS
Image of page 2
Atoms Atoms arethebuilding blocks of matter. Understanding the structure and properties of atoms is critical as combinations of atoms lead to the formation of unlimited number of chemical compounds, some of which areessential for life.
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Dalton’s Atomic Theory 1. Matter is composed of indivisibleatoms. 2. All atoms of a given chemical element have identical properties. 3. Different chemical elements arecomposed of different atoms of different masses. 4. Atoms areindestructibleand chemical reactions area rearrangement of atoms. 5. A compound forms fromits elements through thecombination of atoms of unlike elements in small wholenumber ratios. John Dalton
Image of page 4
1. Matter is composed of indivisible atoms Particle Symbol Absolute Charge (C) Relative Charge Absolute mass (kg) Electron e- -1.60 x 10 -19 -1 9.11 x 10 -31 Proton p+ 1.60 x 10 -19 +1 1.673 x 10 -27 Neutron n 0 0 0 1.675 x 10 -27 Wenow know that atom have subatomic particles called electrons, neutrons and protons.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Thenucleus of an atom contains protons and neutrons. Thenucleus contains nearly all of themass of the atom, but it occupies only a tiny fraction of thespaceinside the atom 1. Matter is composed of indivisible atoms Electrons movearound thenucleus.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern