1. Consider the following statements about the nucleus. Which of these statement
ID: 923458 • Letter: 1
Question
1. Consider the following statements about the nucleus. Which of these statements is false?
a.
Neutrons and protons together constitute the nucleus.
b.
The nucleus is a sizable fraction of the total volume of the atom.
c.
Electrons occupy essentially empty space around the nucleus.
d.
Nearly all the mass of an atom resides in the nucleus.
e.
The nuclei of all elements have approximately the same density.
2. The mass deficiency of Ne (atomic mass is 20; atomic number is 10) is 0.1731 g/mol. Calculate the binding energy for Ne in kJ/mol of atoms.
a.
2.73 x 1011 kJ/mol
b.
1.16 x 1010 kJ/mol
c.
1.56 x 1010 kJ/mol
d.
1.69 x 1010 kJ/mol
e.
2.77 x 1011 kJ/mol
a.
Neutrons and protons together constitute the nucleus.
b.
The nucleus is a sizable fraction of the total volume of the atom.
c.
Electrons occupy essentially empty space around the nucleus.
d.
Nearly all the mass of an atom resides in the nucleus.
e.
The nuclei of all elements have approximately the same density.
Explanation / Answer
1. b. The nucleus is a sizable fraction of the total volume of the atom.
2. DE = DmC^2
= 0.1731*10^(-3)*(3*10^8)^2
= 1.56*10^10 kj/mol
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