Indicate which of these lists contains only trace elements.
A) sulfur,chlorine,oxygen
B) selenium,hydrogen,calcium
C) boron,oxygen,carbon
D) silicon,fluorine,tin
E) cobalt,calcium,sodium
Correct Answer:
Verified
Q2: The innermost electron shell in an atom
Q3: The smallest stable units of matter are
A)
Q5: Isotopes of an element differ in the
Q8: By weight, which element is the most
Q8: The atomic number represents the number of
A)electrons
Q9: One mole of any element
A)has the same
Q10: The "atomic weight" of an atom reflects
Q14: If an element is composed of atoms
Q15: Which element commonly has only a proton
Q35: The molecule CO₂ is known as
A)carbonized oxygen.
B)carbonated
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