1. What are the 3 subatomic particles? Proton, neutron, and electron What is an atom? Catalyst 1. What are the 3 subatomic particles? Proton, neutron, and electron 2. What are the charges associated with them? Positive (proton), Neutral (neutron), Negative (electron) 3. Where are they found in the atom? Nucleus (proton and neutron), Electron cloud (electron) 11/7/11 26L continued

Learning Target (Reminder) 11/7/11 What is an atom? Learning Target (Reminder) LT #2: I can explain the different parts of an atom and where they are located. *What is an atom Powerpoint *Atom animation http://web.visionlearning.com/custom/chemistry/animations/CHE1.3-an-atoms.shtml 26R continued

(Heavy/light? Big/small?) (Nucleus or Electron Cloud?) 11/7/11 What is an atom? Subatomic Particles Table Complete the table below.   Charge (+, 0, or -) Mass/Size (Heavy/light? Big/small?) Location (Nucleus or Electron Cloud?) Symbol (p, e, n) Proton Neutron Electron 26R continued

(Heavy/light? Big/small?) (Nucleus or Electron Cloud?) 11/7/11 What is an atom? Subatomic Particles Table Answers: Copy/correct your answers.   Charge (+, 0, or -) Mass/Size (Heavy/light? Big/small?) Location (Nucleus or Electron Cloud?) Symbol (p, e, n) Proton  + Heavy/big   Nucleus p  Neutron  0 n  Electron -  Light/Small   Electron Cloud  e 26R continued

Learning Target Self-Assess LT #2: Rate yourself on a 3, 2, 1 scale. 11/7/11 What is an atom? Learning Target Self-Assess LT #2: Rate yourself on a 3, 2, 1 scale. 3 is “I really know this” and 1 is “I don’t really get it.” Hold up your 3, 2, 1 with your fingers. 26L continued

Brainpop Atomic Model: 11/7/11 Atomic Theory Learning Target #3 LT #3: I can describe the different atomic theories and how they have developed over time. Brainpop Atomic Model: http://www.brainpop.com/science/matterandchemistry/atomicmodel/ 27R

Brainpop Periodic Table: 11/7/11 The Periodic Table Learning Target #4 LT #4: I can read and understand the periodic table of elements and explain all the different sections. Brainpop Periodic Table: http://www.brainpop.com/science/matterandchemistry/periodictableofelements/ 28R

Vocabulary and Reading The Periodic Table Vocabulary and Reading Write the definitions of the following words. Atomic number Isotopes Mass number Atomic mass Periodic table Period Group Chemical symbol 11/7/11 28R

1. What are the periods on the periodic table? What are the groups? Catalyst 1. What are the periods on the periodic table? What are the groups? Periods are the horizontal rows and groups are the columns. 2. Define atomic number and atomic mass. Atomic number is the number of protons and atomic mass is the number of protons and neutrons. 11/9/11 28L

Learning Target #4 (Reminder) 11/9/11 The Periodic Table Learning Target #4 (Reminder) LT #4: I can read and understand the periodic table of elements and explain all the different sections. Now, please put everything away except a pencil and a separate sheet of paper. 28R

IV. The Periodic Table

A. The periodic table is table/chart in which the elements are arranged in the order of increasing atomic numbers. B. The periodic table was developed by a Russian chemist named Dmitri Mendeleev.

C. Reading the periodic table Number of Electrons in each shell Atomic number 2 6 8 O Element symbol Element name Oxygen 15.9994 Atomic mass

D. Using to periodic table Always look at the key for each periodic table used. 1. Atomic number - is the number of protons and electrons for each atom. It is also the order in which the modern periodic table is set up. 2. . Atomic mass- is the sum of the protons and neutrons in an atom.

Quick Review! Atomic Mass: Add what two things? Atomic Number: is the number of what two things?

Quick Review! Atomic Mass: Add what two things? Protons + Neutrons = Atomic Mass (Remember: Pete and Ned from the Atoms family!) 2. Atomic Number: is the number of what two things? Protons and Electrons (Remember: P.E.)

E. The Number of Neutrons in an Atom To find the number of neutrons in an atom use the following formula: Neutrons= Atomic Mass-Atomic Number Ex. To find the number of neutrons in a Carbon atom you would subtract the Atomic Mass (12) - Atomic number (6) this = 6 neutrons

Practice finding neutrons!!! Find the number of neutrons in the following elements: (Lithium) Li= (Sodium) Na= (Potassium) K=

Practice finding neutrons Find the number of neutrons in the following elements: Li= 6.9(round to 7)-3= Na= 22.9(round to23)-11= K= 39.1(round to 39)-19= Li= 4 neutrons Na= 12 neutrons K= 20 neutrons

VI. Families and periods A. The number of rings and number of electrons on the last ring of any given element determines it position on the period table. B. Groups- vertical columns *Similar chemical properties

C. Each horizontal row on the periodic table is called a period. *Not alike, but have the same number of energy levels