MULTIPLE UNUILE QUESTION Before the International chemists meeting, what was the main issue when it came to the
elements?
atomic number
atomic weight
names
symbols
Rewatch

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver