Isotope Practice Worksheet
Isotope Practice Worksheet Name:
LT 3.1: Use the periodic table to identify and count subatomic particles within the atom.
⇨ I can use the atomic number of an element to identify protons and electrons for any element
⇨ I can apply the relationship, “mass number = protons + neutrons,” to find protons, neutrons, or mass for any element
⇨ I can give the nuclear symbol for an atom given protons, neutrons, and electrons AND use the nuclear symbol to find protons, neutrons, and electrons for an atom
⇨ I can determine the number of neutrons when given the mass number, or the mass number when given the number of neutrons, for any isotope.
⇨ I can write the hyphen notation for any isotope given protons, neutrons, and electrons AND use the hyphen notation to find protons, neutrons, and electrons for an atom.
1. Here are three isotopes of an element: 612C 613C 614C
a. The element is: __________________
b. The number 6 refers to the _________________________
c. The numbers 12, 13, and 14 refer to the ________________________z
d. How many protons and neutrons are in the first isotope? _________________
e. How many protons and neutrons are in the second isotope? _________________
f. How many protons and neutrons are in the third isotope? _________________
2. Complete the following charts:
|Hyphen Notation |atomic # |mass # |# of protons |# of neutrons |# of electrons |
|uranium-235 | | | | | |
|uranium-238 | | | | | |
|boron-10 | | | | | |
|boron-11 | | | | | |
|Element |Symbol |Atomic Number |Number of |Number of |Mass number |Nuclear symbol |Atomic Mass |
| | | |electrons |Neutrons | | | |
|Helium | | |2 |2 | | | |
| |Ti | |22 | |50 | |Ti - 50 |
| | |73 |73 |108 | | | |
|Gallium | | |31 |39 | | | |
| | | | | | |13C | |
| | | | | | |6 | |
| | | | | | |226 | |
| | | | | | |88Ra | |
| | |83 |83 |127 | | | |
Isotope Practice Worksheet Name: KEY
LT 3.1: Use the periodic table to identify and count subatomic particles within the atom.
⇨ I can use the atomic number of an element to identify protons and electrons for any element
⇨ I can apply the relationship, “mass number = protons + neutrons,” to find protons, neutrons, or mass for any element
⇨ I can give the nuclear symbol for an atom given protons, neutrons, and electrons AND use the nuclear symbol to find protons, neutrons, and electrons for an atom
⇨ I can determine the number of neutrons when given the mass number, or the mass number when given the number of neutrons, for any isotope.
⇨ I can write the hyphen notation for any isotope given protons, neutrons, and electrons AND use the hyphen notation to find protons, neutrons, and electrons for an atom.
3. Here are three isotopes of an element: 612C 613C 614C
a. The element is: ____carbon______________
b. The number 6 refers to the ________atomic number _________________
c. The numbers 12, 13, and 14 refer to the ______atomic mass __________________
d. How many protons and neutrons are in the first isotope? _p: 6 & n: 6 ________________
e. How many protons and neutrons are in the second isotope? _____ p: 6 & n: 7 ____________
f. How many protons and neutrons are in the third isotope? ______ p: 6 & n: 8 ___________
4. Complete the following charts:
|Hyphen Notation |atomic # |mass # |# of protons |# of neutrons |# of electrons |
|uranium-235 | 92 |235 |92 |143 |92 |
|uranium-238 | 92 |238 |92 |146 |92 |
|boron-10 | 5 |10 |5 |5 |5 |
|boron-11 | 5 |11 |5 |6 |5 |
|Element |Symbol |Atomic Number |Number of |Number of |Mass number |Nuclear symbol |Atomic Mass |
| | | |electrons |Neutrons | | | |
|Helium |He |2 |2 |2 |4 |4 He |He – 4 |
| | | | | | |2 | |
|Titanium |Ti |22 |22 |28 |50 |50 Ti |Ti - 50 |
| | | | | | |22 | |
|Tantalum |Ta |73 |73 |108 |181 |181 Ta |Ta - 181 |
| | | | | | |73 | |
|Gallium |Ga |31 |31 |39 |70 |70 Ga |Ga - 70 |
| | | | | | |31 | |
|Carbon |C |6 |6 |7 |13 |13C |C - 13 |
| | | | | | |6 | |
|Radium |Ra |88 |88 |138 |226 |226 |Ra -226 |
| | | | | | |88Ra | |
|Bismuth |Bi |83 |83 |127 |210 |210 Bi |Bi - 210 |
| | | | | | |83 | |
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