Question

Which of the following groups of elements on the periodic table are gases at room temperature?

A) Noble gases.
B) Alkali metals.
C) Halogens.
D) Lanthanides.

Answer 1

The noble gases, specifically the elements in Group 8A, are gases at room temperature. Other elements like hydrogen, nitrogen, oxygen, fluorine, and chlorine are also gases at room temperature.

Step-by-step explanation:

The elements that are gases at room temperature can be found in different groups on the periodic table. The noble gases, which are in Group 8A, are the elements that are gases at room temperature.

These include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Other elements that exist as gases at room temperature include hydrogen (H₂), nitrogen (N₂), oxygen (O₂), fluorine (F₂), and chlorine (Cl₂).