Multiple Choice
Three naturally occurring isotopes exist for the hypothetical element athenium. 2.50% of athenium atoms have a relative mass of 26.0 amu, 75.0% of athenium atoms have a relative mass of 27.0 amu, and 22.5% of athenium atoms have a relative mass of 28.0 amu. What is the atomic mass of athenium?
A) 26.8 amu
B) 27.0 amu
C) 28.0 amu
D) 27.2 amu
Correct Answer:
Verified
Correct Answer:
Verified
Q70: What is the total number of atoms
Q71: Match the molecules with the appropriate classification.<br>-
Q72: The number of protons, electrons and neutrons
Q73: Place in the blank the letter of
Q74: Which of the following was not a
Q76: Place in the blank the letter of
Q77: All atoms of a given element may
Q78: Choose the correct chemical symbol for an
Q79: Fill in the blanks in the following
Q80: A hypothetical element, Rz, has two isotopes: