Two atoms have the same number of neutrons but different numbers of protons. These two atoms

A. have the same atomic mass.
B. will exhibit different chemical properties.
C. have the same number of electrons.
D. are isotopes of each other.


Answer: B

Physics & Space Science

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A. 0
B. 1/4
C. 1/2
D.
E. 1

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Indicate whether the statement is true or false

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100 g of liquid nitrogen at its boiling point of 77 K is stirred into a beaker containing 600 g of 15°C water. If the nitrogen leaves the solution as soon as it turns to gas, how much water freezes? The heat of vaporization of nitrogen is 48 cal/g and that of water is 80 cal/g

a. none c. 68 g b. 29 g d. 109 g

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The kinetic energy of a proton is 80% of its total energy. What is the momentum in kg?m/s of the proton?

A) 5.0 × 10-19 kg?m/s B) 2.5 × 10-19 kg?m/s C) 5.0 × 10-18 kg?m/s D) 2.5 × 10-18 kg?m/s E) 1.5 × 10-19 kg?m/s

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