Very small semiconductor crystals, composed of approximately 1000 to 10,000 atoms, are palled quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors, depending on dot size. The density of CdSe is 5.82 g/cm 3 a. What is the mass of one 2.5-nm CdSe quantum dot? b. CdSe quantum dots that are 2.5 nm in diameter emit blue light upon stimulation. Assuming that the dot is a perfect sphere and that the empty space in the dot can be neglected, calculate how many Cd atoms are in one quantum dot of this size. c. What is the mass of one 6.5-nm CdSe quantum dot? d. CdSe quantum dots that are 6.5 nm in diameter emit red light upon stimulation. Assuming that the dot is a perfect sphere, calculate how many Cd atoms are in one quantum dot of this size. e. If you wanted to make one 6.5-nm dot from multiple 2.5-hm dots, how many 2.5-nm dots would you need, and how many CdSe formula units would be left over, if any?
Very small semiconductor crystals, composed of approximately 1000 to 10,000 atoms, are palled quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors, depending on dot size. The density of CdSe is 5.82 g/cm 3 a. What is the mass of one 2.5-nm CdSe quantum dot? b. CdSe quantum dots that are 2.5 nm in diameter emit blue light upon stimulation. Assuming that the dot is a perfect sphere and that the empty space in the dot can be neglected, calculate how many Cd atoms are in one quantum dot of this size. c. What is the mass of one 6.5-nm CdSe quantum dot? d. CdSe quantum dots that are 6.5 nm in diameter emit red light upon stimulation. Assuming that the dot is a perfect sphere, calculate how many Cd atoms are in one quantum dot of this size. e. If you wanted to make one 6.5-nm dot from multiple 2.5-hm dots, how many 2.5-nm dots would you need, and how many CdSe formula units would be left over, if any?
Very small semiconductor crystals, composed of approximately 1000 to 10,000 atoms, are palled quantum dots. Quantum dots made of the semiconductor CdSe are now being used in electronic reader and tablet displays because they emit light efficiently and in multiple colors, depending on dot size. The density of CdSe is 5.82 g/cm3
a. What is the mass of one 2.5-nm CdSe quantum dot?
b. CdSe quantum dots that are 2.5 nm in diameter emit blue light upon stimulation. Assuming that the dot is a perfect sphere and that the empty space in the dot can be neglected, calculate how many Cd atoms are in one quantum dot of this size.
c. What is the mass of one 6.5-nm CdSe quantum dot?
d. CdSe quantum dots that are 6.5 nm in diameter emit red light upon stimulation. Assuming that the dot is a perfect sphere, calculate how many Cd atoms are in one quantum dot of this size.
e. If you wanted to make one 6.5-nm dot from multiple 2.5-hm dots, how many 2.5-nm dots would you need, and how many CdSe formula units would be left over, if any?
Compared to their neutral atom counterparts, ions will have smaller or larger atomic radii due to their losing or gaining electrons. According to Jensen (2010), Linus Pauling assigned the radius of the oxygen anion (O“) at 140 pm (larger than the neutral atom, 66 pm). On the other hand, the magnesium atom loses 95 ppm from its 160 ppm radius when it loses two valence electrons, forming the magnesium ion.
Determine the value of constant B wen constant n is approcimately 8. Unit is in N-m9
Compared to their neutral atom counterparts, ions will have smaller or larger atomic radii due to their losing or gaining electrons. According to Jensen (2010), Linus Pauling assigned the radius of the oxygen anion (O“) at 140 pm (larger than the neutral atom, 66 pm). On the other hand, the magnesium atom loses 95 ppm from its 160 ppm radius when it loses two valence electrons, forming the magnesium ion.
What is the attractive force in nanoNewtons between the magnesium and oxygen ions? Use 2 decimal places.
What is the repulsive force in nanoNewtons between the magnesium and oxygen ions? Use 2 decimal places.
Arrange the following in order of decreasing size? Mg2+, K+ and Ar?
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