A mixture of gases at 2.00 atm pressure and at 273 k contains .70 mol of N2 and .30 mol of O2. Calculate the partial pressure of each gas

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Which change in temperature is the smallest? a change of 1 thomson degree a change of 1 kelvin degree a change of 1 fahrenheit degree a change of 1 celsius degree