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Chapter 7: Problem 128

Give the name and formula of each of the binary compounds formed from the following elements. a. \(\mathrm{Li}\) and \(\mathrm{N}\) b. Na and \(\mathrm{Br}\) c. \(\mathrm{K}\) and \(\mathrm{S}\)

Short Answer

Expert verified
The binary compounds formed are: a. Lithium nitride \(\mathrm{(Li_3N)}\) b. Sodium bromide \(\mathrm{(NaBr)}\) c. Potassium sulfide \(\mathrm{(K_2S)}\)

Step by step solution

01

Identify the charges of each element

To find the charge of each element, we can refer to the periodic table. The group number (column) of an element often indicates its charge. Alkali metals (Group 1) have a +1 charge, while elements in Group 16 have a -2 charge. Elements in Group 17 have a -1 charge. a. Lithium (Li): Group 1, has a +1 charge Nitrogen (N): Group 15, has a -3 charge b. Sodium (Na): Group 1, has a +1 charge Bromine (Br): Group 17, has a -1 charge c. Potassium (K): Group 1, has a +1 charge Sulfur (S): Group 16, has a -2 charge
02

Combine the elements to form neutral compounds

To form compounds, we need to make sure that the total charge is zero. We can do this by combining the elements in ratios that result in a neutral compound. a. Li has a +1 charge and N has a -3 charge. To form a neutral compound, we need 3 Li atoms for each N atom. The formula will be \(\mathrm{Li_3N}\). b. Na has a +1 charge and Br has a -1 charge. To form a neutral compound, we need 1 Na atom for each Br atom. The formula will be \(\mathrm{NaBr}\). c. K has a +1 charge and S has a -2 charge. To form a neutral compound, we need 2 K atoms for each S atom. The formula will be \(\mathrm{K_2S}\).
03

Name the binary compounds

Finally, we can name the compounds according to the constituent elements and their ratios: a. \(\mathrm{Li_3N}\): Lithium nitride b. \(\mathrm{NaBr}\): Sodium bromide c. \(\mathrm{K_2S}\): Potassium sulfide

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Most popular questions from this chapter

The four most abundant elements by mass in the human body are oxygen, carbon, hydrogen, and nitrogen. These four elements make up about \(96 \%\) of the human body. The next four most abundant elements are calcium, phosphorus, magnesium, and potassium. Write the expected ground-state electron configurations for these eight most abundant elements in the human body.

How many unpaired electrons are present in each of the firstrow transition metals in the ground state?

Which of the following sets of quantum numbers are not allowed in the hydrogen atom? For the sets of quantum numbers that are incorrect, state what is wrong in each set. a. \(n=3, \ell=2, m_{\ell}=2\) b. \(n=4, \ell=3, m_{\ell}=4\) c. \(n=0, \ell=0, m_{\ell}=0\) d. \(n=2, \ell=-1, m_{\ell}=1\)

It takes \(208.4 \mathrm{~kJ}\) of energy to remove \(1 \mathrm{~mole}\) of electrons from an atom on the surface of rubidium metal. How much energy does it take to remove a single electron from an atom on the surface of solid rubidium? What is the maximum wavelength of light capable of doing this?

Microwave radiation has a wavelength on the order of \(1.0 \mathrm{~cm}\). Calculate the frequency and the energy of a single photon of this radiation. Calculate the energy of an Avogadro's number of photons (called an einstein) of this radiation.
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