Properties of Elements

Property

Type of

Property

 

Object *

Number

 

 

 

Atomic Number

Real

1

Mass Number †

Real

2

Atomic Weight

Unit

3

Density †

Unit

4

Oxidation States †

String

5

Electron Configuration

String

6

State

String

7

Melting Point

Unit

8

Boiling Point

Unit

9

Heat of Vaporization

Unit

10

Heat of Fusion

Unit

11

Specific Heat

Unit

12

Group (U.S. Customary)

String

13

Family

String

14

Crystal Structure

String

15

Atomic Volume †

Unit

16

Atomic Radius

Unit

17

Covalent Radius

Unit

18

Thermal Conductivity †

Unit

19

Electrical Conductivity †

Unit

20

First Ionization Potential

Unit

21

Electronegativity (Pauling’s number)

Unit

22

Oxide Behavior

String

23

Element Name ‡

String

24

Element Symbol ‡

Name

25

 

 

 

*Properties returning unit objects return real objects if units aren’t used. Unknown values are returned as the string "-".

† See the notes that follow this table.

‡ Not included in catalog of properties, but listed in the title of the catalog.

Notes about properties: Mass number for a stable element is based on the isotope with the highest percent abundance; for a radioactive element, it’s based on the longest half-life. Density for a gas is at 273 K with units of g/l; for others, it’s at 300 K with units of g/cm3. Oxidation states are in order of most stable to least stable. Atomic volume for a gas is for its liquid state at the boiling point; for others, it’s dervied from the density at 300 K. Thermal conductivity is measured at 300 K. Electrical conductivity is measured at 293 K.

Data in the Periodic Table application is based on the “Periodic Table of the Elements” published by Sargent-Welch Scientific Company, a VWR Company, and is used by permission.

B-6 Tables of Units and Constants