Question

This noble gas is named after the Greek word for the Sun, where its spectral lines were first observed.

Answer 1

The noble gas named after the Greek word for the Sun, where its spectral lines were first observed, is helium.

Step-by-step explanation:

The noble gas that is named after the Greek word for the Sun, where its spectral lines were first observed, is helium. In 1868, scientists observed a yellow emission line in the chromospheric spectrum of the Sun that did not correspond to any previously known element on Earth. This new element was named helium, after helios, the Greek word for the Sun. It was later discovered on Earth in 1895. Today, helium is commonly known as the gas used to inflate balloons.