What contributes to the calculation of the mass number?
A) sum of protons,neutrons,and electrons
B) sum of protons and electrons
C) sum of protons and neutrons
D) sum of electrons and neutrons
Correct Answer:
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Q5: What varies from one isotope of an
Q6: Na+is best known as a(n):
A)ion.
B)compound.
C)molecule.
D)macromolecule.
Q7: An atom has 3 electrons in its
Q8: How many electrons are in the outermost
Q9: What is meant by N2?
A)Two nitrogen atoms
Q11: Which subatomic particle carries a negative charge?
A)proton
B)electron
C)neutron
D)nucleus
Q12: An atom of iron has an atomic
Q13: The atomic number represents the number of:
A)protons
Q14: Interpret what is meant by carbon-13.
A)Carbon-13 represents
Q15: Solid blood cells would settle out of
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