Which element has the greatest electronegativity?
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How many ions that have a +1 charge will bond with an ion that has a -2 charge
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When the water vapor cools it condenses select a number that represents his process on the
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Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?
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