1.1 periodic table

45 %
55 %
Information about 1.1 periodic table

Published on March 9, 2014

Author: brownm7

Source: slideshare.net

1.1 Periodic Table Learning Outcomes • History of the idea of elements, • The contributions of the Greeks, Boyle, Davy and Moseley.

Greek Periodic Table

Robert Boyle • Element cannot be split up into simpler substances by chemical means

Humphrey Davy • Used electrolysis to break down water into hydrogen and oxygen. Isolated potassium and sodium.

Henry Mosely • Measured No.of protons in the nuclei of atoms. Atomic number to arrange elements.

Dobereiner • Saw trends and similarities among several groups of elements in threes • Triads = groups of 3 elements • Chlorine = 35.5, Bromine = 80, Iodine = 127 (average of Cl and I = 81)

Newlands • Tried to find some mathematical relation between the atomic weights of elements which were chemically similar • Groups called octaves • Arranged the elements in rows of seven • Eighth element had properties similar to the first

“Law of Octaves” because of its similarity to musical octaves Li Be B C N O F Na Mg Al Si P S Cl K Ca ? ? As Se Br


Dimitri Mendeleev • He suggested that the properties of the elements were a function of their atomic masses • Left gaps for undiscovered elements • Gave a name and predicted the properties of these yet to be discovered elements.

Mendeleev’ s Table

Learning Outcomes • Elements. Symbols of elements 1–36. • The periodic table as a list of elements arranged to demonstrate trends in their physical and chemical properties. • Brief statement of the principal resemblances of elements within each main group, in particular alkali metals, alkaline earth metals, halogens and noble gases.

Modern periodic table • Elements in the periodic table are arranged in periods (rows) and groups(columns). Atomic number increases as you move across a row or period.

Modern periodic table

Periods • The period number of an element signifies the highest unexcited energy level for an electron in that element.

Groups • Elements within a group share several common properties. • Groups are elements have the same outer electron arrangement. • The outer electrons are called valence electrons. Because they have the same number of valence electrons, elements in a group share similar chemical properties. • The Roman numerals listed above each group are the usual number of valence electrons. For example, a group VA element will have 5 valence electrons.

Classifying Elements- Metals

Metals •Metals are lustrous (shiny), malleable (can be hammered) • are good conductors of heat and electricity.

Group 1: Alkali Metals Group 1: Alkali Metals The alkali metals are located in Group IA (Sodium and potassium are examples of these elements. Alkali metals form salts and many other compounds. These elements are less dense than other metals, form ions with a +1 charge, and have the largest atom sizes of elements in their periods. The alkali metals are highly reactive.

Alkaline Metals 1 Learning outcome Demonstration of the reaction with water of lithium, sodium and potassium.

Alkali metals • • • • • • Group 1 Very reactive Low density Soft-can be cut with a knife Burn in air to form oxides React with water to form hydroxides

Sodium • Sodium + Oxygen  Sodium oxide • Sodium + Water  Sodium Hydroxide + Hydrogen gas • Stored in oil to prevent them from reacting with air or water

Group 2: Alkaline Earth Metals The alkaline earths are located in Group IIA (second column) of the periodic table. Calcium and magnesium are examples of alkaline earths. These metals form many compounds. They have ions with a +2 charge. Their atoms are smaller than those of the alkali metals.

Alkaline Earths • • • • • Group 2 Reactive Harder than group one Burn in air to form oxide React with water to form hydroxides







Group 17: Halogens The halogens are located in Group VIIA of the periodic table. Examples of halogens are chlorine and iodine. You find these elements in bleaches, disinfectants, and salts. These nonmetals form ions with a -1 charge. The physical properties of the halogens vary. The halogens are highly reactive.

Halogens • • • • Group 7 Reactive Chlorine, Bromine, Iodine React with hydrogen to form acids

Chlorine • Green gas • Chlorine + Hydrogen  Hydrogen Chloride gas • Hydrogen chloride gas dissolves in water to form Hydrochloric acid. • Chlorine reacts with sodium to form Sodium Chloride [Table Salt]



Group 18: Noble Gases The noble gases are located in Group VIII of the periodic table. Helium and neon are examples of noble gases. These elements are used to make lighted signs, refrigerants, and lasers. The noble gases are not reactive. This is because they have little tendency to gain or lose electrons.

Transition metals

Transition Metals •The transition elements are located in groups IB to VIIIB. •These elements are very hard, with high melting points and boiling points. The transition metals are good electrical conductors. •They form positively charged ions.


Other tables

Other tables

Add a comment

Related presentations

Related pages

Periodic table - Wikipedia, the free encyclopedia

Modern periodic table, in 18-column layout (colour legend below) Part of a series on the: Periodic table; Periodic table forms. 18-column. large ...
Read more

WebElements Periodic Table of the Elements

Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses ...
Read more

1. atomic structure and periodic table - chemrevise

N Goalby chemrevise.org 1 1. Atomic Structure and Periodic Table Details of the three Sub-atomic (fundamental) Particles Particle Position ...
Read more

periodic 2.1.1 : Python Package Index

periodic 2.1.1. Download periodic-2.1.1.tar.gz. A periodic table API. Package Documentation. ... It’s usage for now is limited to periodic table reference.
Read more

alcascience7b - 1.4 Periodic table of elements

PERIODIC TABLE OF ELEMENTS This is a large version of the periodic table and contains the symbol, atomic number, and mean atomic mass value for the natural ...
Read more

Dynamic Periodic Table

1 1 Hydrogen 1.00794 H 1 Atomic # Name Atomic Weight Symbol C Solid Hg Liquid H Gas Rf Unknown Metals Nonmetals ... Dynamic Periodic Table Author: Michael ...
Read more

Dynamic Periodic Table

Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full ...
Read more

Search › vocabulary 1.1 periodic table abbreviations | Quizlet

Search results for: vocabulary 1.1 periodic table abbreviations. 500 Study Sets 500 Sets 500 Classes 500 Users; Advertisement
Read more

9C.2.1.1 Periodic Table | SciMathMN

MN Standard Benchmarks. 9C. Explain the relationship of an element's position on the periodic table to its atomic number and electron configuration.
Read more

1.1: The Periodic Table - Chemwiki

The nuclear atom. The precise physical nature of atoms finally emerged from a series of elegant experiments carried out between 1895 and 1915. The most ...
Read more