Answer: I think it is noble gasses.
Explanation: Use the website Dynamic Periodic Table for stuff like that it helps.
<span>c.Solids have a fixed shape, so they do not show random motion of particles.</span>
"A red giant is a star that has exhausted the primary supply of hydrogen fuel at its core. An average-sized star like our Sun will spend the final 10 percent of its life as a red giant. In this phase, a star's surface temperature drops to between 3,140 and 6,741°F (1,727 and 3,727°C) and its diameter expands to 10 to 1,000 times that of the Sun. The star takes on a reddish color, which is what gives it its name."
The compound ch3ch2-sh is in the organic family know as c. thiols