Choose the statement below that does NOT help explain why the ionization energy of cadmium is so much larger than that of indium
c.
This statement is not true. Electrons in the 4d subshell spend less time within the filled shells than does indium's one electron in the 5p subshell. Electrons with lower l values have more elliptical orbits. In this case, the electron in the 5p shell is at higher energy from its quantum number and from being alone in the outermost shell. This makes it easier to ionize.
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This graph shows how the average distances between galaxies changes with time in the four models for the universe, and also shows data points measured from white dwarf supernovae. Which of the following statements best describes what the data are telling us?
A) The data indicate that we live in an accelerating universe. B) The data prove beyond doubt that we live in an accelerating universe that will continue to expand forever. C) The data strongly suggest that our universe is made 95% of dark matter and only 5% of ordinary matter. D) The data prove beyond doubt that the universe will never collapse.
A "standing wave" is a wave that
A) vibrates at zero amplitude. B) vibrates and moves from one place to another but whose shape does not change. C) doesn't vibrate. D) a wave that is in the process of reversing its direction of motion. E) vibrates but whose "loops" don't move from one place to another.
A 45-mH ideal inductor is connected in series with a 60-? resistor through an ideal 15-V DC power supply and an open switch. If the switch is closed at time t = 0 s, what is the current 7.0 ms later?
A) 250 mA B) 650 mA C) 550 mA D) 280 mA E) 850 mA
Long-period comets are believed to come from ______________
a. the Oort cloud b. interstellar space c. the asteroid belt d. the Great Red Spot