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Chapter 2: Problem 28

Give the number of protons and electrons in (a) a \(\mathrm{C}_{60}\) molecule. (b) a CN- ion. (c) a \(\mathrm{CO}_{2}\) molecule. (d) an \(\mathrm{N}^{3-}\) ion.

Short Answer

Expert verified
To summarize: (a) A C60 molecule has 360 protons and 360 electrons. (b) A CN- ion has 13 protons and 14 electrons. (c) A CO2 molecule has 22 protons and 22 electrons. (d) An N3- ion has 7 protons and 10 electrons.

Step by step solution

01

(a) Calculate the proton and electron count in a \(\mathrm{C}_{60}\) molecule.

A \(\mathrm{C}_{60}\) molecule consists of 60 carbon atoms. The atomic number of carbon is 6, which means that each carbon atom has 6 protons. Therefore, the total number of protons in the molecule is \(60 \times 6 = 360\). Since it is a neutral molecule, the number of electrons is also 360.
02

(b) Calculate the proton and electron count in a CN- ion.

The CN- ion consists of one carbon and one nitrogen atom. The atomic number of carbon is 6, and for nitrogen, it is 7. Therefore, the total number of protons in the ion is \(6 + 7 = 13\). Since the ion has a negative charge, it means there is one extra electron compared to a neutral molecule. Therefore, the total number of electrons is \(13 + 1= 14\).
03

(c) Calculate the proton and electron count in a \(\mathrm{CO}_{2}\) molecule.

A \(\mathrm{CO}_{2}\) molecule consists of one carbon and two oxygen atoms. The atomic number of carbon is 6, and for oxygen, it is 8. The total number of protons in the molecule is \(6 + 2(8) = 22\). As it is a neutral molecule, the number of electrons is also 22.
04

(d) Calculate the proton and electron count in an \(\mathrm{N}^{3-}\) ion.

The \(\mathrm{N}^{3-}\) ion is an ion of nitrogen with three extra electrons. The atomic number of nitrogen is 7, which means it has 7 protons. Considering the three extra electrons, the electron count is \(7 + 3 = 10\).

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Most popular questions from this chapter

WEB See the definition of isobars in Question 15. Consider Na-21 and write the nuclear symbol for (a) an isotope of Na-21 that has one more neutron than \(\mathrm{Na}-21\). (b) an isobar of Na-21 with atomic number 10 . (c) a nucleus with 11 protons and 12 neutrons. Is this nucleus an isotope of \(\mathrm{Na}-21\) ?

Which period of the periodic table (a) has no metals? (b) has no nonmetals? (c) has one post-transition metal and two metalloids?

Consider two isotopes Fe-54 and Fe-56. (a) Write the nuclear symbol for both isotopes. (b) How do they differ from each other?

Which group in the periodic table (a) has one metalloid and no nonmetals? (b) has no nonmetals or transition metals? (c) has no metals or metalloids?

Given the following condensed formulas, write the molecular formulas for the following molecules. (a) dimethylamine \(\left(\mathrm{CH}_{3}\right)_{2} \mathrm{NH}\) (b) propyl alcohol \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{2} \mathrm{OH}\) 26\. Write the condensed structural formulas and molecular formulas
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