Silicon has three naturally occurring isotopes: Si-28,Si-29,and Si-30. If the average atomic mass of silicon is 28.09,which isotope has the highest isotopic abundance?
A) Si-28
B) Si-29
C) Si-30
D) All isotopes have the same isotopic abundance.
Correct Answer:
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Q11: How many protons are in the isotope
Q12: Which element is not an alkali metal?
A)Li
B)Kr
C)Rb
D)Na
E)All
Q13: The element symbol for manganese is _.
A)M
B)Ma
C)Mg
D)Mn
Q14: The element symbol for sulfur is _.
A)S
B)Su
C)Sf
D)Sl
Q15: Which element is a noble gas?
A)H
B)Ne
C)Pr
D)Ra
E)More than
Q17: Which element is a transition metal in
Q18: What is the atomic number of the
Q19: What is the maximum number of electrons
Q20: Which atom has the largest atomic radius?
A)K
B)Ga
C)Br
D)Rb
Q21: The proper electron-dot symbol for aluminum is
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