Write the nuclear symbols for three isotopes of oxygen in which there are 8

# Write the nuclear symbols for three isotopes of oxygen in which there are 8

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Write the nuclear symbols for three isotopes of oxygen in which there are 8, 9,  and 10 neutrons, respectively. Solution Use a   Periodic Table   to look up the atomic number of oxygen. The atomic  number indicates how many protons are in an element. The nuclear symbol  indicates the composition of the nucleus. The atomic number (number of protons)  is a subscript at the lower left of the symbol of the element. The mass number  (sum of the protons and neutrons) is a superscript to the upper left of the element  symbol. For example, the nuclear symbols of the element hydrogen are:

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Unformatted text preview: 11H, 21H, 31H Pretend that the superscipts and subscripts line up on top of each other - they should do so in your homework problems, even though they don't in my computer example ;-) Answer The element symbol for oxygen is O and its atomic number is 8. The mass numbers for oxygen must be 8 + 8 = 16; 8 + 9 = 17; 8 + 10 = 18. The nuclear symbols are written this way (again, pretend the superscript and subscript are sitting right on top of each other beside the element symbol): 168O, 178O, 188O...
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Write the nuclear symbols for three isotopes of oxygen in which there are 8

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