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Chapter 4: Problem 149
Arrange calcium, strontium, arsenic, bromine, and chlorine in order of (a) increasing atomic size and (b) increasing first ionization energy.
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How can you tell how many electrons a representative metal is likely to lose? What, in general, will be the charge of the cation it forms?
Which electromagnetic radiation is most dangerous to humans? (a) X-rays (b) Ultraviolet light (c) Gamma rays (d) Infrared light (e) Radio waves
A student has written what he thinks are some ground-state electron configurations. Which ones have something wrong with them? What is wrong? (a) \(1 s^{2} 2 p^{6} 3 s^{1}\) (b) \(1 s^{2} 2 s^{6} 3 s^{2} 3 p^{6} 4 s^{2} 4 p^{6}\) (c) \(2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{7}\) (d) \(1 s^{2} 2 s^{2} 2 p^{7} 3 s^{3} 3 p^{6}\) (e) \(1 s^{2} 2 s^{2} 2 p^{5} 3 s^{1}\) (f) \(1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{10} 4 p^{6} 5 s^{1} 4 d^{4}\) [This is the transition metal niobium, which violates the four-block electron-assignment rules, so be careful.]
Predict the formula of the compound that forms when lithium atoms react with nitrogen atoms. Completely explain your reasoning.
According to Bohr's model, is energy absorbed or released when an electron moves to a shell of lower \(n\) ?
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