Which of the following pairs of atomic symbols representisotopes? a.^235 U and ^

Question

Which of the following pairs of atomic symbols representisotopes? a.^235 U and ^238 U     b. P4 andP8   c. ^32P and ^83Pb    d. ^50Sn and ^51Sb The atomic symbol for Beryllium, ^9 lower 4Be, indicates thatthe _____. a. atomic number is 4   b. atomic number is9   c. mass number is 4   d. atomic number is9-4 Which of the following pairs of atomic symbols representisotopes? a.^235 U and ^238 U     b. P4 andP8   c. ^32P and ^83Pb    d. ^50Sn and ^51Sb The atomic symbol for Beryllium, ^9 lower 4Be, indicates thatthe _____. a. atomic number is 4   b. atomic number is9   c. mass number is 4   d. atomic number is9-4

Explanation / Answer

Isotopes: The atoms which have same atomic number anddifferent atomic masses called them isotopes. So to given all pairs a) .^235 U and ^238 U is the isotopic pair. hence option a) is the correct answer. Beryllium, ^9 lower 4Be idicates that 4 is the atomicnumber of Be and 9 is the atomic mass of Be . hence option a) is the correct answer.

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