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Ta Os Rh in Periodic Table

Ta, Os, Rh are metals in the periodic table.

Metals are chemical substances that share electrons to gain stability. They are good conductors and pass electricity and heat when they are used as conductors.

Metals will shine when they are freshly prepared, polished, or fractured.

Ta Os Rh in the periodic table

Ta, Os, Rh Metals:

Interestingly, these three metals (Ta Os Rh) are found at the center of the periodic table.

1. Ta stands for Tantalum:  

Tantalum is a rare, blue-gray, hard, shiny chemical substance and it is highly resistant to corrosion. In the periodic table, Tantalum’s atomic number is 73. Since it shows corrosion resistance, Tantalum has been used to prepare alloys to increase strength and ductility. In the electronics industry, Tantalum is used to develop high-power resistors and capacitors.

2. Os stands for Osmium:

Osmium is the densest silvery metal and is found least abundantly. Its atomic number is 76. Osmium belongs to the platinum group of metals. It is very strong and brittle even at higher temperatures. It has only a few uses. It is used to develop very hard alloys for instrument pivots, needles, fountain pen tips, and electrical circuits. In the chemical industry, Osmium will also be used as a catalyst.

3.  Rh stands for Rhodium:

Rhodium is a very hard, extremely rare, corrosion-resistant, silvery-white,  and chemically inert transition metal. 45 is the atomic number of Rhodium. It reduces the formation of nitrogen oxides in flue gases. Rhodium acts as catalysts, hence, it has been used in the chemical industry, especially in the hydrogenation reactions for producing acetic acid and nitric acid. It is also used to enhance the corrosion resistance of palladium and platinum.

Frequently asked questions

1. What do these signs stand for on the periodic table Ta Os Rh?

a. Gas

b. Metals

c. Non-metals

d. Metalloids

Answer: b (Metals).


Gas: Any substance found in the gaseous state is called as Gas. Gas is a shape and volume-less element.

Example: Carbon dioxide, Helium, Nitrogen, Oxygen, etc.

Metalloids: A metalloid is a type of chemical element which is lied between metals and nonmetals since it is a mixer of both metals and nonmetals. Example: Arsenic and Antimony.

Non-metals: Any chemical element that lacks the characteristics of the metals is represented as nonmetals. They can be gases or solid elements. Non-metals easily attain negative charges by accepting electrons and they do not conduct electricity and heat.

Example: Iodine, Bromine, Sulfur, Hydrogen, Sulfur, Selenium, Carbon, Phosphorus, etc.

2. Ta, Os, Rh stand for?

Answer: Ta stands for Tantalum, Os stands for Osmium, and Rh stands for Rhodium.


  1. PERIODIC TABLE. ELEMENT SUMMARY. Tantalum. National Library of Medicine (National Center for Biotechnology Information).
  2. Ana Virel, Jose Sanchez-Lopez, Laura Saa, Ana Carla García, Valeri Pavlov (2009). Use of an osmium complex as a universal luminescent probe for enzymatic reactions. DOI: 10.1002/chem.200900498
  3. F Vanhaecke, M Resano, M Pruneda-Lopez, L Moens (2002). Determination of platinum and rhodium in environmental matrixes by solid sampling-electrothermal vaporization-inductively coupled plasma mass spectrometry. DOI: 10.1021/ac020378a.

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