The most common isotope of rubidium has an atomic number 37 and a mass number 85
ID: 796649 • Letter: T
Question
The most common isotope of rubidium has an atomic number 37 and a mass number 85. Such an atom contains
37 protons, 85 neutrons, 37 electrons.
48 protons, 37 neutrons, 48 electrons.
37 protons, 48 neutrons, 37 electrons
39 protons, 46 neutrons, 39 electrons.
37 protons, 37 neutrons, 48 electrons.
Which set of quantum numbers is possible for an electron in an atom?
n = 3, l = 0, ml = 1 , ms =
A.37 protons, 85 neutrons, 37 electrons.
B.48 protons, 37 neutrons, 48 electrons.
C.37 protons, 48 neutrons, 37 electrons
D.39 protons, 46 neutrons, 39 electrons.
E.37 protons, 37 neutrons, 48 electrons.
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Which set of quantum numbers is possible for an electron in an atom?
A.n = 3, l = 0, ml = 1 , ms =
Explanation / Answer
1) C
2) B
note:
for question 1:
atomic number = number of electrons = number of protons
and
mass number = number of protons + number of neutrons