How do the sizes of atoms change as we move from left to right across a row in the periodic table?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

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?

What type of reaction fuels the processes seen here?