Day 06- The Modern Periodic Table

Day 06­ The Modern Periodic Table Review from Yesterday
Crash Course Chemistry #1: The Nucleus (10 min)
http://www.youtube.com/watch?v=FSyAehMdpyI
The Modern Periodic Table
The Element Song
http://www.youtube.com/watch?v=zGM­wSKFBpo
The father of the modern periodic table is Dmitri Mendeleev (1834­1907). He arranged the elements in order of increasing atomic mass and noticed that elements have similar properties at regular intervals and these were arranged in columns.
There were a few errors in this arrangement that were corrected when chemists arranged the elements in order of atomic number instead of atomic mass. Periodic Law states that when the elements are arranged according to increasing atomic number , elements with similar properties occur at regular intervals.
Day 06­ The Modern Periodic Table Periods
A period is a horizontal row on the periodic table. There are 7 periods. For example, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon make up period 2.
B­R
Diagrams
The trends in the table are largely based on the arrangement of electrons in their energy levels. (see figure 2.8 on p. 43)
The number of shells an atom has correspond to it's period. (eg. period 2 has two shells)
Electron levels can be seen in Bohr­Rutherford diagrams (2, 8, 8 & 2 pattern) (excludes transition metals)
Day 06­ The Modern Periodic Table Groups/Families
A group (or family) is a column in the periodic table. For example group 1 is made up of lithium, sodium, potassium, rubidium, cesium and francium. Members of the same family have the same number of valence electons. Valence electrons are seen easily on Lewis dot diagrams. Members of the same family have similar chemical and physical properties. ex. the alkali metals are reactive.
Brainiac: The Alkali Metals (3 min)
http://www.youtube.com/watch?v=m55kgyApYrY
Day 06­ The Modern Periodic Table Introduction to the Periodic Table: Metals, Non­Metals and Metalloids
http://www.youtube.com/watch?v=TIxiDESxc0I
Metals
Metalloids
Good Youtube Channel
Non Metals
The Periodic Table Layout
Homework:
http://www.youtube.com/watch?v=PIFPLjGOaH8
1) See p. 41 in text. a) Colour and label the following groups on your periodic table: Main metals, transition metals, inner transition metals, metalloids, and non­metals. b) Label the following on the table:
all 7 periods, all 18 groups (1­18), alkali metals, alkali earth metals, halogens, noble gasses. 2) Create a chart showing the groups in the periodic table , the number of valence electrons in the group, and the general properties of that group.
# Valence e Group/Family Properties 3) p. 42 # 2 ­Only do group 1 and 2 elements
p. 46 # 3, 4, 5, 6 p. 48 # 6, 4,8