The pie chart shown below represents the elemental composition of the human body including water. 
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Q8: An element has the following electron arrangement.
shell
Q9: If the atom ratio of Na to
Q10: The statement below describes an intensive property.
Q11: Group 4A and Group 14 are two
Q12: When a particular solid sample is examined
Q14: The elements sodium, potassium, and oxygen are
Q15: Elements in the same period of the
Q16: An element is a shiny gray solid
Q17: A mole of an element contains the
Q18: Sodium is a highly reactive metal and
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