A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutr

Noble gas notation serves as a condensed form of indicating electron configurations. This notation employs the symbol for the preceding noble gas in the electron configuration of an element. For antimony, the noble gas prior is Kr, which means Xe is not used in its electron configuration. Similarly, for radium, the prior noble gas is Rn, whereas, for uranium, it is also Rn. However, for cesium, the preceding noble gas is Xe, thus it is utilized in the noble gas notation for Sb, specifically written as: Cs: [Xe] 6s.

Answer: cesium

Answer:

In the context of NMR spectroscopy, a significant magnetic field creates an energy difference between the alpha and beta spin states, which allows nuclei to absorb RF radiation, ultimately leading to the excitation of a nucleus from a +1/2 spin state to a -1/2 spin state.

Explanation:

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To determine the mass of salt using Avogadro's number, we find the moles of NaCl: 8.24x10²² molecules NaCl divided by 6.022x10²³ molecules NaCl per mole gives 0.14 mole NaCl. We can convert moles to grams of NaCl by multiplying 0.14 mole by 58g NaCl per mole, yielding a total of 8.12 g NaCl.

Clarification:

Within a hexagonal close-packed (HCP) unit cell, the ratio of lattice points to octahedral and tetrahedral holes is  1: 1: 2.

Defining the:

Number of lattice points = 1x.

Number of octahedral points = 1x

Number of tetrahedral points = 2x

Assuming anions occupy the HCP lattice points and cations fill half of the tetrahedral holes.

The number of anions in the HCP lattice points, A= 1x

The cation count at tetrahedral points, B =  

Thus, the compound's formula will be =

If anions occupy the HCP lattice points and cations take all of the tetrahedral holes, the number of anions remains as A= 1x

The count of cations at tetrahedral points would now be B = 2x

Thus, the formula for the compound will be =