The noble (inert) gases all have what similar atomic characteristic?
a. They all have the same atomic number.
b. They all have the same quantum number.
c. They all have a complete set of electrons in their outer shell.
d. They all have a single electron in their outer shell.
e. They are all chemically similar to the halogens, which are in the column just before the noble gases in the periodic table.
c
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A nucleus of carbon 14 has 6 protons and 8 neutrons. The atomic number and mass number of carbon 14 are, respectively,
A) 6 and 8 B) 6 and 14 C) 8 and 14 D) 14 and 20 E) 14 and 22
Blue stars are hotter than red stars
a. True b. False Indicate whether the statement is true or false
A particle moving along the x axis has a position given by x = 54t? 2.0t3 m. At the time t = 3.0 s, the speed of the particle is zero. Which statement is correct?
A. The particle remains at rest after t = 3.0 s. B. The particle no longer accelerates after t = 3.0 s. C. The particle can be found at positions x< 0 m only when t< 0 s. D. All of the above are correct. E. None of the above is correct.
A mountain climber of mass 60. kg slips and falls a distance of 4.0 m, at which time he reaches the end of his elastic safety rope. The rope then stretches an additional 2.0 m before the climber comes to rest
What is the spring constant of the rope, assuming it obeys Hooke's law?