What are the three types of scientific investigations?

a. investigative, comparative, and experimental
b. descriptive, collective, and investigative
c. collective, comparative, and experimental
d. descriptive, comparative, and experimental

What is limiting reactant? with examples

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.