| A | B |
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| Atoms of different elements have different numbers of __________. | protons |
| Atoms of the same element always have the________ number of protons | same |
| The ______ of an element is the number of protons in each atom of that element | atomic number |
| ________ are atoms of the same element that have different masses. | Isotopes |
| The isotopes of a particular element all have the same number of ________ and ________ but different numbers of __________. | protons, electrons, neutrons |
| The mass number is the total number of _______ and _________ that make up the __________ of an isotope | protons and neutrons in the nucleus |
| The number of protons and neutrons in the nucleus of an atom is equal to the atom's _______. | mass number |
| How would you write the hyphen notation of an isotope of carbon that had a mass number of 14? | carbon-14 |
| If you are given the mass number and the atomic number of an element, how do you find the number of neutrons in the nucleus? | # of neutrons = mass# - atomic# |
| If you are given the mass number and the number of protons in an element, how do you find the number of neutrons in the nucleus? | # of neutrons = mass number - the # of protons |
| If you are given the number of protons and the number of neutrons in an element, how do find the mass number? | add the # of protons to the # of neutrons |
| If you are given the number of protons and the number of neutrons in an element, how do find the atomic number? | The atomic number = the number of protons |
| If you are given the number of protons and the number of neutrons in an element, how do find the name of the element? | Look on the periodic table for the element with an atomic number that = the number of protons you were given |
| If you are given the mass number and the atomic number of an element, how do you find the name of that element? | Look on the periodic table for the element with the same atomic number. The mass number is irrelevant. |
The number 19 on the periodic table box below is the ____ of potassium.,  | atomic number, |
| The number 39.0938 is the _____ of potassium., | average atomic mass |
| According to the image below, how many protons does potassium have?, | 19 (you can tell by the atomic number), |
| How many electrons would an atom of potassium have?, | 19 (the same as the number of protons because atoms are electrically neutral), |
| How would you write the nuclear symbol for an isotope of Lithium that has 3 protons and 4 neutrons in its nucleus? | .,  |
| The graphic below shows the nuclear symbol for an isotope of lithium. What does the 7 and the 3 refer to?, | The 7 is the mass number and the 3 is the atomic number, |
| How many protons and how many neutrons are in this isotope of lithium?, | 3 protons and 4 neutrons, |
| The average atomic mass of an element is the weighted average of all naturally occurring _______ of that element. | isotopes |
