Transcript Chapter 4.1
Chapter 4.1 Periodic Table Metals vs. Non-metals Metals -left of the staircase -good conductors of heat/electricity -ductile and malleable -shiny and usually silver coloured -all solid except mercury (liquid) Metals vs. Non-metals Non-metals -right of the staircase -poor conductors of heat/electricity, solids, some are gases and one (bromine) is a liquid Metalloids -touch the staircase except Aluminum (metal) -properties are a mix of metal and non-metal properties Shade these categories on your periodic table Metals/Nonmetals and Metalloids Organization Period - horizontal rows on the periodic table - the period number tells you how many rings of electrons should be drawn on a Bohr diagram Group - also called a family - vertical rows on the periodic table - elements in a group all have similar physical and chemical properties because they have the same number of valence electrons Chemical Families Alkali Metals -column 1: soft, silver-grey metals -react easily with water and oxygen in air -one valence electron ** doesn’t include hydrogen Alkaline Earth Metals -column 2: silver-grey metals -harder and less reactive than column 1 metals -2 valence electrons Chemical Families Halogens -column 17: coloured non-metals -very reactive -7 valence electrons Noble Gases -column 18: colourless, odourless gases -very unreactive/inert (doesn’t combine easily with other atoms) Shade these categories on your periodic table, write the names of the families and the pattern of valence electrons Periodic table families Pattern for the Number of Valence electrons Information on the Periodic Table The name, atomic number, atomic mass, state of matter at room temperature,element symbol and ion charge is usually given for each element Atomic number-the number of protons in an atom. It gives the element its identity since this number is UNIQUE for each element! Atomic mass – protons + neutrons Homework p. 148 #1-5 p. 149 #1-3 p. 150 #1-3 ****QUIZ on SECTION 4.1 Material (everything up to today) on MONDAY!