Isotopes
72(x) + 74(100x) divided by 100= 72.59
A sample of germanium is run through a mass spectrograph and it is discovered that there are two isotopes of this element (72Ge and 74Ge). Since the average molar mass of germanium is 72.59 grams, what are the percentages of the two isotopes? What's the equation for this problem?
^39, 19 K
Contains 19 electrons and 20 neutrons. (K)
81 protons, 123 neutrons
How many protons and neutrons are in the nuclei of 204Tl atoms?
8 protons, 8 neutrons, 17 electrons
How many protons, neutrons and electrons are in ^16, 8 O 1-
16 protons, 16 neutrons, 18 electrons
How many protons, neutrons and electrons are in ^32, 16 S 2-
54(.50000) + 55(23.10) + 56(76.40) divided by 100.
Using a mass spectrogram, the following information is found for the three isotopes of iron. 54Fe - 0.5000%, 55Fe - 23.10%, and 56Fe - 76.40%. According to this information, what is the average mass of iron? What's the equation for this problem?
50(.250) + 51(99.750) divided by 100
Vanadium has two major isotopes, 50V and 51V. 50V is only 0.250% of the naturally occurring metal while 51V is 99.750%. Calculate the average atomic mass of a vanadium sample. What's the equation for this problem?
^103, 45 Rh
What is the atomic number, mass number, and symbol for the element that has 45 protons and 58 neutrons? (Rh)
isotopes
_______ are atoms that have the same number of protons but different numbers of neutrons (so different mass numbers)
lower left
atomic number is at _________ corner
8 protons, 8 neutrons
how many protons and neutrons are in ^16, 8 O
16 protons, 16 neutrons
how many protons and neutrons are in ^32, 16 S
mass number-atomic number
how to get number of neutrons
upper left
mass number is at _______ corner
electrons
number of _____ is generally equal to the number of protons. when these numbers are NOT equal, the difference is shown at top right corner.
atomic number
number of protons in the nucleus of an atom
mass number
the number of protons and neutrons in the nucleus of an atom
relative abundance
the proportion each species represents of all individuals in the community
