An atom s mass number equals the number of

a. protons plus the number of electrons.

c. protons.

b. protons plus the number of neutrons.

d. neutrons.

How many decigrams (dg) are in 0.822 micrograms?

Which of the following is an example of a model?

element x is a neutral element and has 39 protons. what element is it and how many electrons does it have? (use the periodic table)

A 500N person stands in an elevator that is moving downward at constant speed. The force that the floor exerts on the person must be

Temperature is most closely related to which property of a liquid? the volume of the liquid the number of atoms in each molecule the speed of movement of the molecules the total number of molecules

Compare how an increase in wavelength affects sounds and light waves.

The addition of an acid to water increases the [H30*) of the solution and increases the solution pH. True or False True False

31.65 mL volume of 1.07 M Fe (NO3) 3 is mixed with 44.96 mL of 0.79M Fe (NO3) 3 solution. Calculate the molar concentration of the final solution. Save rounding until the end.

At standard pressure, during which physical change does the potential energy decrease?

How are inner and outer planets different?