Which of the following is NOT an essential element?
A) C
B) Kr
C) I
D) O
E) F
Correct Answer:
Verified
Q2: Which of the following has the smallest
Q3: Main group or representative elements are NOT
Q8: Which of the following statements concerning essential
Q9: The concentration of a major essential
Q9: Elements in group 17 (VIIA) are called
A)alkali
Q11: Essential elements
A)are those with a beneficial physiological
Q15: An essential biological element _
A)is any element
Q23: Sodium is best described as a _
A)
Q50: Elements in group 18 (VIIIA) are called
Q56: Calcium is an example of _
A) an
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