If a platinum atom has 78 protons. How many electrons does it contain?

Describe the difference between a strong acid and a weak acid.

What is the maximum amount by which the wavelength of an incident photon could change when it undergoes compton scattering from an atom or molecule with a 36.0 u mass? (1 u = 1.66 * 10-27 kg) ?

How are galaxies organized and distributed within the universe

What is the wavelength of a sound wave that has a speed of 250m/s and a frequency of 400hz

When a sealed thermos bottle full of hot coffee is shaken what are the changes in the temperature of the coffee and the internal energy of the coffee?

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect

When a raw egg gets heated into an edible egg is this considered a physical or chemical change?

Starting at its rightmost position, it takes 2 seconds for the pendulum of a grandfather clock to swing a horizontal distance of 18 inches from right to left and 2 seconds for the pendulum to swing back from left to right.