Helium was discovered by Sir William Ramsay and independently by N. A. Langley and P. T. Cleve at 1895 in England and Sweden. A French astronomer Janssen first obtained evidence for the existence of helium during the solar eclipse of 1868 in India. For many years helium was known as an element that might exist on the sun but unknown on the Earth. Sir William Ramsay discovered helium after treating a uranium mineral. Lockyer and Professor Edward Frankland suggested the name helium. A sample of the gas was sent to Sir William Crookes and Sir Norman Lockyer who identified helium.The name is derived from the Greek 'helios' meaning sun, as it was in the sun's corona.
Helium is a gaseous chemical element,with a symbol of He. Its atomic number is 2 and atomic weight is 4.0026. Helium is one of the noble gases on the periodic table. It’s the second lightest element. Helium is a colourless, odourless, insipid and non-toxic gas. It’s less soluble in water than any other gas. It’s the less reactive element and doesn’t form chemical compounds. The density of helium vapour is very low, but has high thermal conductivity. Helium can be liquefied, but its condensation temperature is the lowest among all the known substances. …show more content…
The most readily recognized use for helium gas is to inflate blimps, scientific balloons and party balloons. The barcode scanners in stores use helium-neon lasers to scan barcodes and transmit the information to the computer. Tanks you use for scuba diving are made of 80 percent helium.
Helium is known as He on the periodic table. Helium is the second most abundant element in the universe and was discovered on the sun before it was found on the earth. It has been detected in great abundance in hotter stars and it is an important component in both the proton-proton reaction and the carbon cycle, which accounts for the energy of the sun and stars.
Helium is commercially recovered from natural gas
Helium is a gaseous chemical element,with a symbol of He. Its atomic number is 2 and atomic weight is 4.0026. Helium is one of the noble gases on the periodic table. It’s the second lightest element. Helium is a colourless, odourless, insipid and non-toxic gas. It’s less soluble in water than any other gas. It’s the less reactive element and doesn’t form chemical compounds. The density of helium vapour is very low, but has high thermal conductivity. Helium can be liquefied, but its condensation temperature is the lowest among all the known substances. …show more content…
The most readily recognized use for helium gas is to inflate blimps, scientific balloons and party balloons. The barcode scanners in stores use helium-neon lasers to scan barcodes and transmit the information to the computer. Tanks you use for scuba diving are made of 80 percent helium.
Helium is known as He on the periodic table. Helium is the second most abundant element in the universe and was discovered on the sun before it was found on the earth. It has been detected in great abundance in hotter stars and it is an important component in both the proton-proton reaction and the carbon cycle, which accounts for the energy of the sun and stars.
Helium is commercially recovered from natural gas