What Does "X" Represent in the Following Symbol

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Q70: Identify the chemical symbol of element Q

Q71: Which of the following elements is a

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Q76: Give the number of neutrons for carbon-14,with

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Q228: An atom of ¹⁴C contains _ protons.<br>A)6<br>B)20<br>C)8<br>D)10<br>E)14