TM Row 3

History
1 pt

What are gold or mercury?

One of the two elements known since prehistoric times that are in this row

2 pt

What is platinum?

Element in this row discovered in the late 17th century in Columbian silver mines

3 pt

What is rhenium?

Next-to-last naturally occurring element to be discovered (1925) and the last that has a stable isotope

4 pt

What is lanthanum?

Element in this row who's name means "to lie hidden", indicating the challenges in it's discovery

5 pt

What is hafnium?

Element in this row named for it's location of discovery (Copenhagen)...in Latin...

Oxidation States
1 pt

What is +3?

Most common/stable oxidation state in the early transition metals

2 pt

What is +2?

Oxidation state typically not obtained by early transition metals (unless when ligated to stabilizing liganes)

3 pt

What is Os (group 8)?

Last element in this row where the "group" oxidation state is observed

4 pt

What is disproportionation?

Process by which two unstable oxidation states undergo electron transfer to obtain a more stable state (e.g., M(IV) + M(II) --> 2 M(III)

5 pt

What is Ir(I), Pt(II), or Au(III)?

One of the metal/oxidation state combinations in this row that produces stable square planar complexes?

Ores
1 pt

What is tantalum?

Tantalite

2 pt

What is tungsten?

Wolframite

3 pt

What are platinum and iridium?

Platiniridium (two elements)

4 pt

What is lanthanum?

Monazite

5 pt

What is tantalum?

Microlite

Uses
1 pt

What is tungsten?

Element in this row used as an incadescent light bulb filament

2 pt

What is hafnium?

Element used in nuclear control rods due to it's ability to absorb neutrons

3 pt

What is rhenium?

Element in this row used as a radioactive tracer

4 pt

What is lanthanum?

Element in this row used in mischmetal, an alloy used in lighter flints

5 pt

What is osmium?

Element in this row used in alloys found in fountain pen nibs and electrical contacts

Fun Facts
1 pt

What is indium? (melting point > 2000 deg C)

Element in this row used in high temperature crucibles

2 pt

What is platinum?

Element in this row commonly used for length/mass standards due to it's high stability

3 pt

What is three (gold, cesium, and copper)?

Number of elements that have a natural color other than grey or white

4 pt

What is OSRAM?

Light bulb company who's name is a combination of oxmium and tungsten's names

5 pt

What is mercury?

Element that led to a preponderance of "mad hatters" in the 18th and 19th centuries

Daily Double
Daily Topic

What is it's an integral component in the capacitors of cellular phones, mp3 players, digital cameras, etc.? (due to it's excellent thermal and electrical conductivity, it can be used for tiny components)

Critical use of tantalum in your daily lives