Warm Up 10/2: 1) What does the number two tell you about Helium?

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Presentation transcript:

Warm Up 10/2: 1) What does the number two tell you about Helium? 2) How many protons, neutrons and electrons does one neutral atom of helium contain? 3) What are columns on the periodic table called? 4) What are the rows called? 5) What element is represented by the model on the right? How do you know? 6) What is the mass of the atom on the right?

What is the name of Group 1A, 7A and 8A? What type of elements are in groups 3B-2B?

Add to “Subatomic Particles” Notes Mass number: the mass of a particular atom , represented as a whole number, units in “amu”. Atomic mass: the average mass of all isotopes of an element, units in “amu”.

Concept Check (You do not need to write this down.) What subatomic particles are found in the nucleus of an atom? What subatomic particle is found outside of the nucleus?

Periodic Table of Elements Trends, Families, Predicting Properties

Brief History: http://edtech2.boisestate.edu/lindabennett1/502/Periodic%20Table%20e%20config/PTable_start.html

Mendeleev’s Table – Published 1869 What’s missing?

Ra discovered by Marie Curie - 1898

(Add to “Chemical Families” Notes) How did Mendeleev predict where newly discovered elements would go on the periodic table? (Add to “Chemical Families” Notes) Elements in the same group/family have VERY similar chemical properties, and therefore behave (react) VERY similarly

Why do elements in the same family behave (react) similarly?

Add to “Atomic Structure” Notes Valence electron: the electrons located in the outermost electron shell of an atom Core electron: all other electrons in an atom besides the valence electrons Electron Shell: the levels around the nucleus where electrons can be found. These levels are represented on models by spheres or circles. Valence shell: the outermost electron shell in an atom.

What do you observe in terms of the number of valence electrons and chemical families?

What patterns did you notice with electrons and electron shells in main group elements?

Periodic Trends: Density Video Clip: http://edtech2.boisestate.edu/lindabennett1/502/Periodic%20Table%20e%20config/PTable_trends.html

Predicting Properties

DO NOW: Read Trends of the Periodic Table Notes Handout 2) Complete Periodic Table Assignment (Directions at the end of Trends of the Periodic Table Handout) – DUE FRIDAY

Predicting Properties

Predicting Properties