31.Radiant energy seems to have a dual nature, with both ______________________ and ______________________ characteristics. 32.The ______________________ the wavelength of a wave of electromagnetic radiation, the greater the energy of its photons. 33.Modern physics tells us that it is ______________________ to know ______________________ where an electron is and what it is doing. 34.In the wave view, an electron has an effect on the space around it that can be described as a wave of ______________________ varying in its intensity. 35.Most of the general descriptions of electrons found in this chapter are based on the wave mathematics for the one electron in a(n) ______________________ atom. 36.All ______________________ electron waveforms are called sorbitals. 37.An atomic orbital may contain ______________________ electrons at most, and the electrons must have different ______________________. 38.When a nonmetallic atom bonds to another nonmetallic atom, the bond is ______________________. 39.When a metallic atom bonds to a nonmetallic atom, the bond is ______________________. 40.Metallic atoms hold some of their electrons relatively loosely, and as a result, they tend to ______________________ electrons and form cations. In contrast, nonmetallic atoms attract electrons more strongly than metallic atoms, so nonmetals tend to ______________________ electrons and form anions. 41.When atoms gain electrons and form anions, they get ______________________. When atoms lose electrons and form cations, they get significantly ______________________.
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542.Paired valence electrons are called ______________________. 43.A(n) ______________________ bond can be viewed as the sharing of six electrons between two atoms. 44.In a reasonable Lewis structure, carbon, nitrogen, oxygen, and fluorine always have ______________________ electrons around them. For the following calculations, be sure to show your work. 45.The density of water at 3.98 °C is 1.00000 g/mL. What is the mass in pounds of 16.785 L of water? (4 points) 46.While you are doing heavy work, your heart pumps up to 25.0 L of blood per minute. Your muscles get about 80% by volume of your blood under these conditions. What volume of blood in quarts is pumped through your muscles in 105 minutes of work that causes your heart to pump 21.0 L per minute, 79.25% by volume of which goes to your muscles? (4 points) 47.In optimum conditions, one molecule of the enzyme carbonic anhydrase can convert 3.6×105molecules per minute of carbonic acid, H2CO3, into carbon dioxide, CO2, and water, H2O. How many molecules could be converted by one of these enzyme molecules in 1 week? (4 points)
648.A vitamin supplement contains 50 micrograms of the element selenium in each tablet. How many moles of selenium does each tablet contain? (4 points) 49.Write the name of the group to which each of the following belongs. (4 points) a.fluorine ______________________b.helium ______________________c.