How should scientist respond when new evidence that challenges current is presented?

There are main groups in the modern periodic table of elements

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