Of the 90 or so naturally occurring elements, only four are liquid near room temperature: mercury (melting point = -38.87 °C), bromine (melting point = -7.2 °C), cesium (melting point = 28.40 °C), and gallium (melting point = 29.78 °C). Convert these melting points to degrees Fahrenheit.
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Master Temperature with a bite sized video explanation from Jules Bruno