General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOOD/ METAL HARDWARE/ FELT LINING UNDER BASE

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

N/A

Width

38.0 cm

Height

78.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Chemistry

Category

Demonstration & teaching equipment

Sub-Category

N/A

Manufacturer

AKA

NRC

Country

Canada

State/Province

Ontario

City

Ottawa

Context

Country

Canada

State/Province

Ontario

Period

1940S +

Canada

FROM LABORATORY OF NATIONAL RESEARCH COUNCIL OF CANADA, ONE OF CANADA'S FOREMOST RESEARCH ESTABLISHMENTS IN NUMBER OF SCIENTIFIC & TECHNOLOGICAL AREAS. MODEL WAS DEVELOPED BY NRC SCIENTIST DR. DON STEDMAN. IN 193OS HE EXPRESSED BELIEF THAT THERE WERE MORE THAN 92 ELEMENTS, AN IDEA SUBSEQUENTLY FOUND TO BE CORRECT.

Function

THREE DIMENSIONAL REPRESENTATION OF PERIODIC TABLE OF ELEMENTS, CONSISTING OF CYCLIC SPIRAL ARRANGEMENT OF ELEMENTS. HYDROGEN IS AT APEX & SERIES OF ELEMENTS IS ARRANGED IN SPIRAL, INCLUDING AS YET UNDISCOVERED HEAVY ELEMENTS.

Technical

ACCORDING TO DR. STEDMAN (REF. 1), THIS ARRANGEMENT HAS ADVANTAGE OF SEPARATING EACH TYPE OF ELEMENT WITHOUT AMBIGUITY. IT ACCOMMODATES RARE EARTH & VIII GROUPS AS INTEGRAL & SIGNIFICANT PART OF ORDERLY DEVELOPMENT OF TABLE. OPPOSING NATURE OF ELECTROPOSTIVE & ELECTRO- NEGATIVE ELEMENTS IS CLEARLY SHOWN. VARIOUS BROAD CLASSES OF ELEMENTS ARE CLOSELY GROUPED. DR. STEDMAN POSTULATED THAT THERE WERE MORE THAN 92 ELEMENTS AND HIS MODEL INCLUDES SUPER HEAVY ATOMS.

Area Notes

Unknown

Details

Markings

NONE

Missing

UNKNOWN

Finish

PAINTED WHITE/ GREEN FABRIC

Decoration

NONE