AP Chemistry › Mass Spectroscopy of the Elements
Which of the following isotopes has the greatest number of neutrons?
Which of the following statements is true?
Which of the following describes an isotope to ?
Anionic atoms are __________ than their respective neutral atoms because they have __________ electron(s) than their neutral atoms.
An element has two main isotopes. The first isotope has a molar mass of 125 grams, and the second isotope has a molar mass of 128 grams. A naturally occurring sample of the element has a molar mass of 126.8 grams.
What is the lighter isotope's percentage in the natural sample?
Chemical has only two isotopes:
and
. The atomic weight of chemical X, listed on the periodic table, is
. What is the relative abundance of each isotope?
What is the sum of the number of neutrons of the following atoms: (a) N15
(b) Ag109 (c) Si30
A certain element X is comprised of isotopes A, B, and C. Isotope A has a mass of 50 amu and is 70% of naturally occurring X. Isotope B is 35 amu and is 25% of X. Isotope C has a mass of 70 amu and is 5% of X. What is the atomic weight of element X?
How many of each subatomic particle exist in ?
Which of the following contains the most neutrons?