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ch 17
| Question | Answer |
|---|---|
| Atom | the smallest part of an element that retains all the properties of that element |
| Atomic Number | the number of protons in an atom |
| Average Atomic Mass | weighted-average mass of the mixture of the isotopes of that element |
| Electron | negatively charged, fast-moving particle that moves through the empty space surrounding an atom's nucleus |
| Electron Cloud | region surrounding an atom where there is a high probability of finding an electron |
| Electron Dot Diagram | element symbol surrounded by dots representing the atom's valence electrons |
| Group | a vertical column of elements in the periodic table; also called a family |
| Isotope | atomic nuclei having the same number of protons but different numbers of neutrons |
| Mass Number | the number after an element's name, representing the sum of its protons and neutrons |
| Neutron | neutral subatomic particle in an atom's nucleus, composed of quarks |
| Nucleus | extremely small, positively charged, dense center of an atom containing protons and neutrons |
| Period | a horizontal row of elements in the modern periodic table of elements |
| Periodic Table | chart that organizes all known elements into a grid arranged by increasing atomic number |
| Proton | a subatomic particle in an atom's nucleus that has a positive charge of 1+; is composed of quarks |
| Quark | elementary particles that make up protons and neutrons |
Created by:
adajahhoran
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