If you read from left to right across a period in the periodic table, which statement is true?

a. the mass of the atoms increases.
b. the number of electrons decreases.
c. the properties of the elements are all roughly the same.
d. the elements are listed in the order they were discovered.

What properties of a moving object are used in determining the object's energy of motion

Consider an insulating crystal, made up of layers of atoms. what form would you expect the temperature dependence of the phonon heat capacity to approach at extremely low temperatures if the interlayer coupling is i)very strong (rigid coupling), and ii) very weak. explain.

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)