Scandium & Niobium

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Scandium

Date of birth:

 Scandium was discovered by in 1879 by Lars Nilson an

 Symbol – Sc

Physical Description

 A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids.

 A solid at room temperature with a melting point of 1814 K ​(1541 °C, ​2806 °F) and

a boiling point of 3109 K ​(2836 °C, ​5136 °F)

 An atomic number of 21 and an atomic mass of 44.955908

 Group 3, Period 4, Transition Metals

 21 electrons, 21 protons and 24 neutrons

Related group or family members:

Chromium (VI), Gallium, Yttrium, Rhodium

Other information:

Scandium was discovered in 1879 by Lars Fredrik Nilson, who named it after Scandinavia.

Its existence was originally predicted by Dmitri Mendeleev ten years before.

Despite the discovery, 99.9% pure scandium wasn't isolated until 1960.

Despite its silvery color, it tarnishes to a yellowish or pinkish color in air.

Scandium is the fiftieth most abundant element on Earth, but is the 23rd most abundant element in the Sun.

 Scandium has 1 stable isotope.

Reward:

$1,500 for 10cm of scandium

Niobium

Date of birth:

 Niobium was discovered by in 1801 by Charles Hatchett

 Symbol – NB

Physical Description

 A silvery-white metallic d-block element, it has historically been sometimes classified as a rare earth element, together with yttrium and the lanthanoids.

 A solid at room temperature with a melting point of 2750 K ​(2477 °C, ​4491 °F) and

a boiling point of 5017 K ​(4744 °C, ​8571 °F)

 An atomic number of 41 and an atomic mass of 92.90637

 Group 5, Period 5, Transition Metals

 41 electrons, 41 protons and 52 neutrons

Related group or family members:

Vanadium, Tantalum, Dubium

Other information:

In 1801, Charles Hatchett discovered a new element in a sample of the ore columbite, and named it columbium.

The ore had first been sent to England in the mid-18th century by the first governor of Connecticut, John Winthrop.

Independently, Heinrich Rose discovered in 1846 that tantalum ore included a second element, which he named niobium.

Nearly twenty years later, a series of experiments concluded that columbium and niobium were actually the same element.

Both names were actually kept in use until 1949, when niobium was chosen as the name for this element.

Isotope93

Reward:

$750 for 5cm of Niobium

Some Great Views of These Elements

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