(science)

when a scientist conducts an investigation, which of the following is the first thing he or she should do?
a) design the experiment
b) make observations
c) identify the problem
d) form conclusions

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.