Consider sodium oxide, Na2O. Choose the best explanation for the subscript, 2, from the list provided.

Atomic theory as it is known today is the result of the contributions of many scientists who did the research, disproved old models, suggested new models, and added to the atomic theory.

Alfred is getting ready to eat a bowl of hot oatmeal. When he grabs the spoon to take a bite, it is very warm to touch. Which method of heat transfer is responsible for heating the spoon?

How do humans recharge their brains

Before a race, an athlete warms up by jogging around the track shown below at a constant rate of 2.3 m/s. What statement best describes his motion as he jogs around the curved part of the track?

What do the formulas for table salt, NaCI, and water, H2O, indicate about these compounds?

Which of the following is a mixture? alcohol water mercury ink

A gas occupies 3.5 L at standard pressure. Find the volume of the gas when the pressure is 1.5 atm.

What is the temperature (in K) of 16.45 moles of methane gas in a 4.95 L container at 4.68 atm?

What do we call the process by which cells obtain the energy that they need?

Which of the following statements describes how the periodic table is organized? 1. The elements are organized alphabetically. 2. The elements are organized by their size. 3. The elements are organized by the date they were discovered. 4.