Lanthanum | Chemistry

Middlefield Collegiate Institute, Markham, Ontario, Canada

Lanthanum, Middlefield Collegiate Institute, Markham ON

Lanthanum: I have a periodic table that describes where each and every element is found in our daily lives for example, Lanthanum is found in camera lenses and in the lenses of stage lights. I chose to draw stage lights in blue, green and red because they are the basic colours that are used on stage. I chose the colours blue and yellow for the symbol and atomic number because they are the national colours of Sweden where lanthanum was discovered in 1836.

Omer Syed grade 12 student, Teacher Alison Veale, Middlefield Collegiate Institute, Markham, Ontario, Canada

Atomic properties*

Name:

Lanthanum

Symbol:

La

Atomic number:

57

Atomic mass:

138.91 amu

Melting point:

920°C

Boiling point:

3464°C

Density:

6.15 g/cm³

Electronegativity:

1.1

# of Isotopes:

2

State:

Solid

Colour:

Silvery-white**

Classification:

Metallic**

* Haynes, W. M. (2011). CRC Handbook of Chemistry and Physics, 91st edition: http://www.hbcponline.com/ Retrieved April 7, 2011

** Winter, M. (2010). Home of the Periodic Table. Retrieved April 8, 2011, from Web Elements: http://www.webelements.com/