Table of Contents
What family is tantalum in?
Tantalum (pronounced as TAN-te-lem) belongs to the family of transition metals and denoted by the chemical symbol Ta.
What period does silver belong to?
Period 5
Fact box
| Group | 11 | 961.78°C, 1763.2°F, 1234.93 K |
|---|---|---|
| Period | 5 | 2162°C, 3924°F, 2435 K |
| Block | d | 10.5 |
| Atomic number | 47 | 107.868 |
| State at 20°C | Solid | 107Ag |
What is the origin of silvers name?
Origin of name : from the Anglo-Saxon word “siolfur” meaning “silver” (the origin of the symbol Ag comes from the Latin word “argentum” meaning “silver”).
Where did the name silver come from?
| Discovery date | approx 3000BC |
|---|---|
| Discovered by | – |
| Origin of the name | The name is derived from the Anglo-Saxon name, ‘siolfur’. |
| Allotropes |
What is the 73rd element?
Tantalum now sits below niobium in the periodic table. It has an atomic number of 73, and an atomic weight of just under 181.
Is tantalum a rare earth element?
Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys….
| Tantalum | |
|---|---|
| Brinell hardness | 440–3430 MPa |
| CAS Number | 7440-25-7 |
| History | |
| Discovery | Anders Gustaf Ekeberg (1802) |
What are the names of the rare earth elements?
Element Groups: The thirty rare earth elements are composed of the lanthanide and actinide series. One element of the lanthanide series and most of the elements in the actinide series are called trans-uranium, which means synthetic or man-made.
What is the atomic number of the element silver?
Silver is a chemical element with atomic number 47 which means there are 47 protons in its nucleus. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.
Which is the rarest metal on the Earth?
These elements, plus lanthanum (element 57) and actinium (element 89), are known collectively as the rare earth elements or rare earth metals. Actually, they aren’t particularly rare, but prior to 1945, long and tedious processes were required to purify the metals from their oxides.
What are the colors of rare earth oxide?
Refined rare-earth oxides are heavy gritty powders usually brown or black, but can be lighter colors as shown here.