There are samples of two different isotopes, X and Y. Both contain the same number of radioactive atoms. Sample X has a half-life half that of Y. How do their decay rates compare?
a. The rates of X and Y are equal.
b. X has a greater rate than Y.
c. The rate depends on atomic number, not half-life.
d. X has a smaller rate than Y.
B
You might also like to view...
Energy in Nuclear Reactions: A nuclear explosion results in a mass decrease of 2.10 g. How much energy is released during this explosion? (c = 3.00 × 108 m/s)
A. 1.89 × 1014 J B. 6.30 × 105 J C. 1.89 × 1013 J D. 2.25 × 1012 J
Latent Heats: The melting point of aluminum is 660°C, its latent heat of fusion is 4.00 × 105 J/kg, and its specific heat is 900 J/kg ? K. If 300 kJ of heat are added to 442 g of aluminum at 100°C, what is the final state of the system? That is, how much is liquid, how much is solid, and what is its temperature?
What will be an ideal response?
Which of the choices below correctly lists things in order from largest to smallest?
A) Sun, Earth, Solar System, Milky Way, Universe B) Universe, Milky Way, Sun, Earth, Solar System C) Solar System, Earth, Sun, Universe, Milky Way D) Universe, Milky Way, Solar System, Sun, Earth E) Milky Way, Universe, Solar System, Sun, Earth
The part of the electromagnetic spectrum most absorbed by water is
A) infrared. B) red. C) cyan. D) all about equally.