Lacey_Che131_S2012_Lect-4s

Lacey_Che131_S2012_Lect-4s - Lec-4: Periodic table and...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Lec-4: Periodic table and Compounds 1 Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 Periodic table Tabular display of chemical elements which provides a useful framework to classify, systematize, and compare the chemical and physical properties of elements. Mendeleev’s Periodic Table ¾ He left open spaces in his periodic table to account for elements not yet discovered Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemical Reactivity ` Families Similar valence e - within a group result in similar chemical properties 1 2 3 4 5 6 7 Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 3 Modern periodic table ` Alkali Metals ` Alkaline Earth Metals ` Transition Metals ` Halogens ` Noble Gases 1 2 3 4 5 6 7 Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 4
Background image of page 2
Periodic table The modern periodic table is based on a classification of elements in terms of their physical and chemical properties. ¾ The horizontal rows are called periods. ¾ Columns contain elements of the same family or group. ¾ The main group elements or representative elements are in groups 1 & 2 (alkaline and alkaline earth metals) and 13 – 18. 9 Group 17 contains the halogens. ¾ Transition metals are the elements in groups 3 - 12 ¾ Transition metals are the elements in groups 3 12. ¾ The noble gasses are the elements in group 18 Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 5 Modern periodic table Period Group Transition elements Elements ordered in terms of increasing atomic number Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 6 ordering reflects electronic configuration
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Information in the Periodic table Each row ( period ) in the table corresponded to the filling of a quantum shell of electrons (will be discussed later). Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 7 Compounds B 2 O 3 ( s ) + NaOH( aq ) Na 3 BO 3 ( ) + H 2 O( l ) Chemical reactions usually involve compounds Essential to know different types and compounds -> Nomenclature Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 8
Background image of page 4
Compounds Metals: 9 High conductivity 9 High melting point 9 Hard 9 malleable Different kinds of [simple] compounds can be formed Metal + Metal Metal Compound Metal + Metal Metal + Non-Metal Ionic Compound Non-Metal + Non-Metal Covalent Compound Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 9 Compounds Covalen Types of Bonds Covalent e.g. H 2 δ + δ - Polar Covalent e.g. HCl + - Ionic e.g. NaCl Roy A. Lacey, Stony Brook University; Che 131, Springl 2012 10 e.g. NaCl
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Compounds ` Molecular compounds are composed of atoms held together by covalent bonds. ` Ionic compounds are composed of positively
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/29/2012 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

Page1 / 15

Lacey_Che131_S2012_Lect-4s - Lec-4: Periodic table and...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online