Chemistry
Chemistry, 08.04.2021 17:50, july00

An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is very reactive. How many neutrons are in this atom? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

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An atom of a certain element has 19 protons, 19 electrons, and a mass number of 39. This element is...

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