| A | B |
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| Atoms of different elements have different numbers of __________. | protons |
| Atoms of the same element alwaysl 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 |
| ______ is the general term for a specific isotope of an element. | Nuclide |
| 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 atomic number of an element, how do you find the number of protons in the nucleus? | # of protons = the atomic number |
| 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 irrelevent. |
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 occuring _______ of that element. | isotopes |
| What is the equation for calculating average atomic mass? | Average atomic mass = atomic mass of isotope 1 X percent composition of isotope 1 + atomic mass of isotope 2 X percent composition of isotope 2 + atomic mass of any other isotopes X % composition of those isotopes |
| How many particles are in 1 mole of a substance? | 6.022 X 10 to the 23rd power |
| How do you determine the molar mass of an element? | Find the average atomic mass of that element on the periodic table and make the unit grams per mole. |
| What is Avogadro's number expressed to 4 significant digits? | 6.022 X 10 to the 23rd power |
| What is the abbreviation for moles? | mol |
| A(n) _____ is the smallest particle of an element that retains the chemical properties of that element. | atom |
| The ____ is a very small region located in the center of the atom. | nucleus |
| The nucleus is made up of at least one positively charged particle called a(n) _____ and usually one or more neutral particles called _____. | proton, neutron |
| Surrounding the nucleus is a region occupied by negatively charged particles called _____. | electrons |
| Protons, neutrons, and electrons are often referred to as ______ particles. | subatomic |
| Except for the simplest type of hydrogen atom, all atomic nuclei are made of _________. | protons and neutrons (the simplest type of hydrogen atom has one proton and no neutrons) |
| The positive charge of a(n) _______ is _______ in magnitude to the negative charge of a(n) ________. | proton, equal, electron |
| A neutron has a ____ charge. | neutral |
| Each element has a different number of _____ in their nucleus. | protons |
| The short-range forces that hold the particles of a nucleus together when they are very close to one another are called _____. | nuclear forces |
| The atomic ______ is the distance from the center of the atom to the outer portion of the electron cloud. | radius |
| Atomic radii are usually measured in _______. | picometers |
What is "A" pointing to and what is its charge?,  | an electron, negative, |
| What is "B" pointing to and what is its charge?, | The nucleus (positive because it consists of positively charged protons and neutral neutrons), |
| What is "C" pointing to and what is its charge?, | proton, positive, |
| What is "D" pointing to and what is its charge?, | neutron, neutral, |
| What is smaller than an electron? | Chuck Norris' sense of fear (but no one has been brave enough to discover it yet),  |
