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early Periodic Table
| Question | Answer |
|---|---|
| substance only made of 1 type of atom with unique set of properties (118 exists) | element |
| subatomic particle with positive charge | proton |
| subatomic particle with negative charge | electron |
| subatomic particle with no (neutral) charge | neutron |
| the sum of protons and neutrons (weighted average) | atomic mass |
| vertical columns on the periodic table (18) | group |
| horizontal rows on the periodic table (7) | period |
| list of all known elements that exist | periodic table |
| the number of protons | atomic number |
| subtract the atomic number from the atomic mass | used to find the number of neutrons |
| center of atom ; location of protons and neutrons | nucleus |
| location of electrons | electron cloud |
| same element, but different number of neutrons | isotope |
| same element, but different number of electrons | ion |
| comes from change in the number of protons | different element |
| to be neutral, these must be in the same amount | protons and electrons |
| building blocks of all matter | atom |
| layout of elements on the 1st periodic table | increasing atomic mass |
| layout of elements on the current periodic table | increasing atomic number |
| he created the first periodic table | D. Mendeleev |
| his research led to change in arrangement of elements on periodic table | H. Moseley |
| name of Group 1 elements | Alkali metals |
| name of Group 2 elements | Alkali Earth metals |
| name of Group 17 elements ; most reactive group | Halogens |
| name of Group 18 elements ; least reactive group | Noble Gases |
| elements found in the d block | transition metals |
| elements found in the f block | inner transition metals |
| is the exception in the Alkali metals | Hydrogen |
| is the exception in the Noble Gases | Helium |
| only elements in the s and p blocks ; Groups 1A to 8A | representative elements |
| diagram showing the nucleus and all electrons in their circular atomic orbitals | Bohr Model |
| states that 2 is the stable number of valence electrons | duplet rule |
| states that 8 is the stable number of valence electrons | octet rule |
| ions with positive charge ; Groups 1 , 12, 13 | cations |
| ions with negative charge ; Groups 15, 16, 17 | anions |
| element with largest atomic radius (size) | Francium [Fr] |
| element with highest electronegativity & ionization energy | Fluorine [F] |
| ability to attract valence electrons from nearby atoms | electronegativity |
| energy needed to remove electrons from an atom | ionization energy |
| diagram showing only valence electrons | Lewis Dot Structure |
| very few (2) elements are this SOM at room temperature | liquids |
| B ; Si and 5 others ; considered semi-conductors | metalloids |
| name of inner electrons (closer to the nucleus) | core electrons |
| name of outermost electrons (furthest from the nucleus) | valence electrons |
| the distance from the nucleus to the outermost electron shell | atomic radius |
Created by:
cadetjt
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