Which of the following isotopes has the same number of neutrons as carbon-14?
a. o-15(atomic # is 8)
b. n-14(atomic # is 7)
c. o-16(atomic # is 8)
d. f-19(atomic # is 9)

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Which of the following is true for a reliable scientific source? it cites logic. it cites opinions. it cites valid data. it cites common sense.