Trends on the Periodic Table - Mr Low's Mt. Boucherie Class
Trends on the Periodic Table More than just a table! The First Periodic Table Dimitri Mendeleev was one of the first to publish a table using these properties to arrange the elements. He placed similar
elements in the same vertical column. He left open spaces on his chart for elements he predicted would someday be found but had not been discovered at that time. The Periodic Law He developed the idea of the Periodic
Law: When elements are arranged in order of increasing atomic weight their properties are repeated periodically. Today we know that atomic number is a better way to structure the periodic table. Mendeleev and other early researchers did not know about protons and neutrons and isotopes. FAMILIES on the Table Families (a.k.a. Groups)- a vertical column on the periodic table in
which elements have similar chemical reactivity Group 1 Alkali metals Include Li+, Na+, K+, etc. most chemically reactive of the metals (must be stored under oil as they will react with air) react explosively with water are so soft they can be cut with a knife YOUVE GOT TO SEE THIS! YOU TUBE CLIP: K + H2O
Group 2 Alkaline Earth metals Includes Be+2, Ca+2, Mg+2, etc. are very chemically reactive and are never found free in nature (same as alkali metals) React with water to produce alkaline (i.e. basic) solutions Group 17 Halogen
family F- , Cl- , Br named from salt former, these elements exhibit all 3 physical states at room temp! are highly reactive with metals, especially alkali metals (as a result they are highly toxic) Group 18 - Noble gases Include He, Ne, Xe, etc are all EXTREMELY STABLE and only rarely react to form compounds Sometimes called INERT GASES
all are gases which are naturally occurring when given energy (with electricity or extreme heat) each noble gas gives off a unique colour PERIODS on the Table Periods- a horizontal row on the periodic table
Sodium (Na) Family Name: Alkali metals Family #: 1 Group #: 3 Organization of the Periodic Table The periodic table organizes all known
elements. Elements are listed in order by atomic number Metals are on the left (the transition metals range from group 3 to group 12), non-metals are on the right, and the metalloids form a staircase in the middle. Rows of elements (across) are called periods. All elements in a period have their electrons in the same general area around their nucleus Columns of elements are called groups, or families
All elements in a family have similar properties, and bond with other elements in similar ways (c) McGraw Hill Ryerson 2007 See page 171 Group 1 = alkali metals Very reactive metals/unstable Group 2 = alkaline earth metals Somewhat reactive metals
Group 17 = the halogens Very reactive non-metals/ unstable Group 18 = noble gases Gases, Not reactive at all, Very stable because they have a full outer shell of electrons (c) McGraw Hill Ryerson 2007
Descriptive Statistics (DS) versus Functions. DS do not auto update; functions do (for the most part) Quick check goes to DS; functions take a while to set up. If functions are unknown, then DS easier to auto create. ... Excel...
Visited friends at Uni and loved what I saw. Applied - not typical A-Level qualifications. Parents valued education, wary of Uni life, cost of tuition fees, accommodation and travel, first to go to Uni in family. Visited Canterbury campus -...
It is estimated that between 750,000 and 1 million SSIs occur in the United States each year (Edmiston et al., 2010). SSIs remains a substantial cause of post-operative morbidity and increased health care costs (Riley et al., 2012).
Arial Arial Black Times New Roman Wingdings Glass Layers Life Science The Cell Theory Types of Microscopes Parts of a Microscope Robert Hooke's Work Leeuwenhoek's Work Parts of a typical animal cell Parts of a typical animal cell Parts of...
Ready to download the document? Go ahead and hit continue!