Which two radioisotopes have the same decay mode? P-32 and Pu-239 Fr-220 and Ra-222 K-37 and K-42 U-233 and Tc-99

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Define dew point. i am writing this part to be able to ask the question

If i add water to oil what will happen