Rank the following elements by electron affinity, from most positive to most negative ea value. arsenic, sulfur, potassium, argon, bromine

The ranking of the elements would be as:

Electron affinity, in simple words can be described as the amount of energy that is released when an electron is added to the outermost or valence shell of an atom and which results in the formulation of an ion with negative charge.

If we look at the periodic table, the values of electron affinity decreases from top to bottom in a group and increase from left to right across a period. This is because when we move from top to bottom in a group, the energy levels increase which lower the pull of nucleus for outer most shell. However, when we move from left to right in a period, the number of energy levels stay same, but the nucleus exerts greater pulling force on the outer most shell electrons that results in greater attraction. so, low amount of energy is released when an electron is added to the valence shell of atom.

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with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them