Compare the viscosity of n-pentane, CH3CH2CH2CH2CH3 C H 3 C H 2 C H 2 C H 2 C H 3 , to the viscosity of n-hexane, CH3CH2CH2CH2CH2CH3 C H 3 C H 2 C H 2 C H 2 C H 2 C H 3 . Match the words in the left column to the appropriate blanks in the sentences on the right. Make certain each sentence is complete before submitting your answer.

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.