5. The graph shows the first ionization energies of some consecutive elements. 1st ionization energy X Atomic number Which statement is correct? A. Y is in group 3 B. Y is in group 10 C. X is in group 5 D. X is in group 18 Y
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The graph displays first ionization energies of consecutive elements plotted against atomic number. First ionization energy is the energy required to remove one electron from a neutral atom, and it follows periodic trends across the periodic table. Show more…
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Below are data on the first four ionization energies for a fictitious element $\mathrm{X}$. First ionization energy $=500 \mathrm{~kJ} / \mathrm{mol}$ Second ionization energy $=2000 \mathrm{~kJ} / \mathrm{mol}$ Third ionization energy $=3500 \mathrm{~kJ} / \mathrm{mol}$ Fourth ionization energy $=25,000 \mathrm{~kJ} / \mathrm{mol}$ From the data, which of the following statements is(are) incorrect? (a) $\mathrm{X}$ could belong to group IIIA. (b) The fourth ionization energy is so much greater than the third ionization energy because $\mathrm{X}^{3+}$ consists of a noble-gas core or a pseudo-noble-gas core. (c) The third ionization energy is greater than the second ionization energy because $\mathrm{X}^{2+}$ has a bigger charge than $\mathrm{X}^{+}$. (d) $X$ could belong to group IIIB. (e) $\mathrm{X}$ could belong to group VA.
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Part E: Periodic Behavior of the Elements Plot the ionization energies of the main group elements with atomic numbers 1-20, and 31-36 on the following graph. Also include the element symbols on your graph. How does the ionization energy vary as you move from left to right across a period? How does the ionization energy vary as you move down a group?
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