1. An atom of silicon has a mass number of 28 and an atomic number of 14. How many protons and how many neutrons are in this atom? Show your calculation.

If you place a paper towel in water, the water will move across the paper towel. which of the following properties best explains why? surface tension adhesion cohesion both adhesion and cohesion

What is the periodic # for uranium?

What is used to classify galaxies? star typesestimated agecolorshape

How does most of the water in the water cycle move from lakes and rivers directly back into the atmosphere?

Which of the following is a possible definition of a base? Select one: a. A substance that increases the concentration of hydronium ions in a solution b. A compound that is a hydrogen ion acceptor in an acid-base reaction c.

What does LeChatelier's principal mean

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.