1.  Bell Ringer 1.Hydrogen 2.N 3.Aluminum 4.P 5.Sulfur 6.C 7.Helium 8.Na 9.Oxygen 10.Mg Give the Symbol or Name for the following Elements:

2.  Bell Ringer 1.Chlorine 2.K 3.Calcium 4.F 5.Manganese 6.Fe 7.Nickel 8.Cu 9.Zinc 10.Br Give the Symbol or Name for the following Elements:

3. Chapter 5.2

4.   Most often there are 4 pieces of information for each element listed on the periodic table. Element Information in the Periodic Table

5.   Most often there are 4 pieces of information for each element listed on the periodic table. Element Information in the Periodic Table Atomic number (# of protons)

6.   Most often there are 4 pieces of information for each element listed on the periodic table. Element Information in the Periodic Table Atomic number Element symbol (1 st capital, 2 nd small)

7.   Most often there are 4 pieces of information for each element listed on the periodic table. Element Information in the Periodic Table Atomic number Element symbol Element name

8.   Most often there are 4 pieces of information for each element listed on the periodic table. Element Information in the Periodic Table Atomic number Element symbol Element name Atomic mass

9.   Atomic mass depends on:  Distribution of an element’s isotopes  Masses of those isotopes.  Isotopes = same element, different masses  Masses different because:  Same # protons  Different # neutrons Atomic Mass

10.   Atomic Mass Units  Scientists chose one isotope to serve as a standard.  This isotope is the most abundant one found in nature  Carbon-12 atom: 6 protons and 6 neutrons.  1 Atomic Mass Unit (amu) = one twelfth the mass of a carbon-12 atom. Atomic Mass

11.   Elements in modern periodic table arranged by increasing atomic number (not mass)  (Atomic number = # of protons).  Periodic Law - Pattern of Repeating Properties  Periods - Each row is a period.  Each period is for a different electron shell or energy level The Periodic Law

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13.   Modern periodic table – stretched out (7 rows)  Shows periods with Lanthanide & Actinide series where they really belong The Periodic Law

14.   Elements are also arranged into vertical columns called Groups (or Families).  Sounds of musical notes separated by an octave are related, but they are not identical.  Properties of elements in a Group (column) are related, but not identical.  Groups - Each column is a Group (or Family).  Similar electron configurations  Similar chemical properties The Periodic Law

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16.  Example: Group 8A (or 18) - Noble Gasses with Full Shells Helium - Atomic #2 Neon - Atomic #10 Argon - Atomic #18

17.  The Periodic Law Periodic Table of the Elements

18.   Largest class of elements on the Periodic Table - Metals.  80% of the elements. Metals

19.   Malleable and ductile (can change shape)  Malleable = compress without breaking  Ductile = stretch without breaking  Good Conductors (thermal & electrical)  Luster (means they are shiny!) Physical Properties of Metals

20.   Groups 3 – 12: Form a bridge between elements on the left and right side of the table  Tough, hard, and strong  Less reactive than standard metals  Have more properties in common than elements in other groups. Transition Metals

21.   Share characteristics of both metals & non – metals.  Semi – conductors Metalloids

22.   Insulators (poor conductivity)  Living organisms are mostly non-metals. (especially C, N, O, H)  Most of the compounds in your body contain carbon Non-Metals

23.   Across a period from left to right, the elements become less metallic and more nonmetallic in their properties.  From left to right across Period 3, there are three metals (Na, Mg, and Al), one metalloid (Si), and four nonmetals (P, S, Cl, and Ar). Variations Across a Period

24.   Sodium reacts violently with water.  Magnesium will not react with water unless the water is hot.  Aluminum does not react with water, but it does react with oxygen.  Silicon is generally unreactive.  Phosphorus and sulfur do not react with water, but they do react with oxygen.  Chlorine is highly reactive.  Argon hardly reacts at all. Variations Across a Period