Question

Name 5 elements that we don't know what the state of matter is at room temperature.

Answer 1

hydrogen, nitrogen, oxygen, fluorine, and chlorine

Step-by-step explanation:

hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).